If your pet suffers from chronic itching, digestive upset, or mysterious skin irritations, you’ve likely encountered the term “elimination diet trial.” This gold-standard diagnostic tool helps pinpoint food sensitivities by stripping away common allergens and reintroducing them systematically. But here’s the challenge: treats. Most pet parents can manage a limited-ingredient main diet, only to inadvertently sabotage the trial with a single biscuit containing chicken fat, beef liver, or hidden grain proteins. Enter rabbit-based hypoallergenic biscuits—a game-changing solution that lets you reward your pet without compromising the integrity of your diagnostic journey. These specialized treats aren’t just novel; they’re carefully crafted to support the strict protocols elimination diets demand while keeping your furry companion motivated.
Understanding what makes a rabbit biscuit truly hypoallergenic requires more than scanning for “rabbit” on the ingredient list. The manufacturing process, protein sourcing, cross-contamination controls, and even the binding agents used can make or break your trial’s success. Whether you’re working with your veterinarian to diagnose a suspected food allergy or managing a confirmed sensitivity long-term, mastering the nuances of these therapeutic treats will empower you to make informed decisions that protect both your pet’s health and your peace of mind.
Top 10 Hypoallergenic Rabbit Biscuits for Elimination Diet
Detailed Product Reviews
1. Oxbow Organic Barley Biscuits, Rabbit & Guinea Pig Treats, Organic Hamster & Bunny Treats with Barley, Apple & Carrot, Made in USA, Small Pet Supplies, 2.65 oz Bag
Overview: Oxbow’s Organic Barley Biscuits represent the gold standard for conscientious small pet owners seeking premium treats. These certified organic biscuits combine barley, apple, and carrot into a wholesome snack suitable for rabbits, guinea pigs, and hamsters. The 2.65-ounce bag delivers concentrated nutrition without artificial additives, making it an excellent choice for health-focused pet parents who want to avoid unnecessary fillers.
What Makes It Stand Out: The USDA organic certification sets these treats apart in a market saturated with processed options. Oxbow’s veterinary nutrition expertise ensures each biscuit provides appropriate fiber content while limiting sugar. The simple, recognizable ingredient list appeals to owners avoiding mysterious “meals” and by-products. Made in the USA under strict quality controls, these treats reflect Oxbow’s decades-long commitment to small animal health and wellness, with a texture that promotes natural chewing behavior.
Value for Money: At $33.15 per pound, these are premium-priced treats. However, the organic certification, limited ingredients, and brand reputation justify the cost. Unlike bulk treats, you’re paying for quality over quantity. For health-conscious owners, the price reflects peace of mind and reduced veterinary risks from inferior ingredients. The small bag size prevents waste from spoilage, ensuring you use every bit of your investment.
Strengths and Weaknesses: Strengths: Certified organic; simple, limited ingredients; trusted Oxbow brand; appropriate for multiple species; promotes dental health through chewing; no artificial preservatives. Weaknesses: Expensive per-pound cost; small bag size (2.65 oz) may not suit multi-pet households; some pets may prefer softer treats; not suitable for daily feeding due to cost.
Bottom Line: These biscuits are ideal for owners prioritizing organic, minimal-ingredient treats. While pricey, the quality and brand reliability make them worth the investment for occasional rewarding. Perfect for single-rabbit households or as a special dietary addition rather than a staple treat.
2. Equa Holistics HealthyGut Probiotics for Rabbits Dietary Supplement, All-Natural Digestive System Formula (120 Servings)
Overview: Equa Holistics HealthyGut Probiotics offers a sophisticated digestive support system specifically formulated for rabbits. This all-natural powder supplement contains 15 species of freeze-dried probiotic organisms combined with prebiotic inulin to maintain optimal gut flora. With 120 servings per container, it provides comprehensive microbiome support for rabbits experiencing stress, digestive upset, or recovering from antibiotic treatment that can disrupt natural gut bacteria.
What Makes It Stand Out: The inclusion of 15 distinct probiotic species demonstrates advanced formulation beyond typical single-strain products. Using human-grade, non-GMO ingredients manufactured to human-grade standards shows exceptional quality commitment. The single daily administration simplifies routine care, while the tasty powder formulation encourages acceptance. The product specifically addresses rabbit digestive physiology, which is notoriously sensitive and critical to overall health.
Value for Money: At $19.95 for 120 servings, the cost breaks down to approximately $0.17 per serving—a reasonable investment in preventive health. Compared to veterinary visits for gastrointestinal stasis, which can exceed hundreds of dollars, this supplement offers economical insurance. The concentrated formula means small quantities deliver therapeutic benefits, making it cost-effective long-term for rabbits with chronic digestive issues.
Strengths and Weaknesses: Strengths: 15 probiotic species for comprehensive support; human-grade ingredients; made in USA; 120 servings per container; easy powder administration; non-GMO; addresses specific rabbit digestive needs; includes prebiotic inulin. Weaknesses: May be unnecessary for healthy rabbits with balanced diets; powder may settle at bottom of bowl; some picky rabbits might refuse it; requires daily consistency; not a replacement for veterinary care.
Bottom Line: This probiotic is a worthwhile addition for rabbits with digestive sensitivities, elderly bunnies, or those recovering from illness. While not essential for every rabbit, it provides excellent preventive care for at-risk pets. The quality formulation justifies the price for concerned owners seeking proactive health measures.
3. Wild Harvest Wild Harvest Advanced Nutrition Diet for Rabbits, 4.5-Pound (WH-83544)
Overview: Wild Harvest’s Advanced Nutrition Diet provides an accessible entry point for rabbit owners seeking a varied diet for their pets. This 4.5-pound bag combines alfalfa, Timothy hay, and assorted vegetables to create a diverse mixture that encourages natural foraging behaviors. Marketed as a complete adult rabbit food, it aims to deliver essential fiber, vitamins, and minerals in an affordable package suitable for daily feeding according to package directions.
What Makes It Stand Out: The blend of multiple hay sources and vegetable pieces distinguishes it from uniform pellets, offering textural variety that stimulates mental engagement. The budget-friendly price point makes rabbit ownership more accessible to families. The formula explicitly promotes foraging instincts, which is crucial for psychological wellbeing and prevents boredom. Wild Harvest provides a full product line, allowing owners to maintain brand consistency across treats and supplements.
Value for Money: At $2.30 per pound, this is among the most economical rabbit foods available. For owners on tight budgets or caring for multiple rabbits, the low cost enables proper feeding without financial strain. However, the inclusion of alfalfa—a calcium-rich hay generally unsuitable for adult rabbits—may lead to long-term health issues that could offset initial savings through future veterinary costs related to urinary or kidney problems.
Strengths and Weaknesses: Strengths: Highly affordable price; varied ingredients encourage foraging; widely available at mass retailers; contains fiber; suitable for short-term use or young rabbits. Weaknesses: Alfalfa content inappropriate for most adult rabbits; may contain fillers and artificial ingredients; inconsistent ingredient quality; lower fiber content than premium brands; could contribute to urinary sludge or kidney issues.
Bottom Line: This food works for budget-conscious owners or as a temporary solution, but it’s not recommended as a long-term staple for adult rabbits. The alfalfa content poses significant health risks. Invest in a Timothy hay-based pellet for your rabbit’s long-term health and wellbeing.
4. Wild Harvest Advanced Nutrition Diet Adult Rabbit 14 Pounds, Resealable Bag
Overview: Wild Harvest’s 14-pound Advanced Nutrition Diet offers bulk convenience for rabbit owners seeking value. This resealable bag contains the same alfalfa and Timothy hay blend as its smaller counterpart, providing a varied mixture of grasses and vegetables. Designed for adult rabbits, it promises balanced nutrition with the added benefit of extended storage capability and reduced per-pound cost that benefits multi-pet households.
What Makes It Stand Out: The substantial 14-pound size with resealable packaging ensures freshness while reducing packaging waste and shopping frequency. The exceptional per-pound price makes it ideal for multi-rabbit households, breeders, or rescue operations managing many animals. The resealable feature is surprisingly rare in bulk pet foods and demonstrates practical design consideration. The variety-rich formula maintains foraging enrichment across many feedings, helping prevent boredom.
Value for Money: At $1.48 per pound, this represents outstanding bulk value—nearly 36% cheaper than the 4.5-pound version. For owners feeding multiple rabbits, the savings become significant over time. The resealable bag prevents spoilage, protecting your investment. However, the same nutritional concerns about alfalfa content remain, potentially compromising long-term health economics through future veterinary costs.
Strengths and Weaknesses: Strengths: Exceptional bulk pricing; resealable freshness; convenient for multiple rabbits; reduces shopping frequency; encourages foraging behavior; excellent value proposition. Weaknesses: Alfalfa-based formula risks urinary issues in adults; large size requires substantial storage space; questionable ingredient quality; not suitable for long-term adult rabbit health; may contain artificial additives.
Bottom Line: This bulk option serves owners with several rabbits or those prioritizing immediate cost savings. While the value is undeniable, the alfalfa content makes it unsuitable as a primary diet for adult rabbits. Consider mixing with Timothy hay pellets or reserve for younger rabbits under one year old to balance cost and health considerations.
Understanding Elimination Diet Trials: The Diagnostic Foundation
An elimination diet trial isn’t simply switching your pet’s food—it’s a controlled scientific experiment conducted in your home. Veterinary dermatologists and nutritionists consider this approach the only reliable method for diagnosing adverse food reactions, which affect up to 10-15% of dogs and cats with chronic skin conditions. The protocol typically spans 8-12 weeks of strict dietary control, during which every morsel entering your pet’s mouth must contain a single novel protein and carbohydrate source they’ve never consumed before.
The precision required is staggering. A single inappropriate treat containing just 1% of a problematic protein can trigger IgE-mediated reactions or non-immunologic intolerances, invalidating weeks of careful observation. This is why hypoallergenic biscuits designed specifically for elimination trials have become indispensable tools—they provide the psychological enrichment of treat-giving while maintaining the biological isolation your diagnostic protocol demands.
Why Rabbit Protein Reigns Supreme for Sensitive Pets
Rabbit meat has emerged as the premier novel protein for elimination diets due to its unique biological profile and historical absence from commercial pet foods. Unlike more common alternatives like kangaroo, venison, or duck—which are increasingly appearing in mainstream formulas—rabbit remains genuinely novel for over 95% of North American pets. Its protein structure contains amino acid sequences that rarely cross-react with antibodies developed against chicken, beef, or dairy allergens.
From a nutritional standpoint, rabbit offers a complete amino acid profile with exceptionally low fat content (approximately 8-10% versus 15-20% in chicken), making it ideal for pets with concurrent pancreatitis or weight management needs. The meat is also naturally rich in B vitamins and minerals while being highly digestible, reducing the gastrointestinal burden during the sensitive trial period. These characteristics explain why veterinary dermatologists increasingly recommend rabbit as their first-choice novel protein for stringent elimination protocols.
Defining “Hypoallergenic”: What the Term Actually Means
The term “hypoallergenic” lacks legal definition in pet food labeling, creating a minefield for conscientious pet parents. True hypoallergenic status depends on hydrolyzation or absolute novelty—not marketing claims. Hydrolyzed proteins are enzymatically broken into fragments too small to trigger immune recognition, while novel proteins like rabbit rely on your pet’s immune system having never encountered them.
For elimination diet biscuits, hypoallergenic should mean: single-source rabbit protein, absence of common allergens (chicken, beef, dairy, wheat, soy, corn), production in dedicated allergen-free facilities, and batch testing for cross-contamination. Be wary of products labeled “hypoallergenic” that simply exclude wheat but still contain multiple protein sources or vague “animal fat” ingredients. The most reliable formulations will explicitly state “for elimination diet trials” and carry veterinary therapeutic endorsements.
Key Features to Scrutinize in Rabbit Biscuits
Single-Source Protein Integrity
The ingredient list must specify “rabbit meal” or “rabbit protein isolate” as the sole animal protein. Avoid formulas listing “rabbit” alongside “rabbit liver” or “rabbit digest” during initial trials, as organ meats contain different protein fractions that could complicate results. The protein should constitute at least 30% of the biscuit on a dry matter basis to ensure it’s the primary ingredient, not a flavor coating.
Carbohydrate Simplicity
Optimal elimination diet biscuits utilize single, novel carbohydrates like sweet potato, tapioca, or chickpea flour. These provide structural integrity without introducing common grain allergens. Potato protein, while plant-based, can still trigger reactions in sensitive individuals and should be avoided during strict trials. The carbohydrate source should be clearly identified and represent the only significant plant material present.
Functional Fat Sources
Quality rabbit biscuits incorporate rabbit fat or novel oils like coconut oil rather than generic “poultry fat” or “animal fat.” Omega-3 fatty acids from algae or flaxseed can support skin health during the trial but must be pure and not blended with fish oils, which contain common allergens. The fat content should remain moderate (8-12%) to prevent pancreatitis while providing essential fatty acids.
Ingredient Red Flags That Invalidate Trials
Certain ingredients act as landmines in elimination diet protocols, often hidden behind innocuous-sounding names. “Natural flavors” frequently derive from hydrolyzed chicken liver or beef stock—absolute no-gos during rabbit trials. “Animal fat” is almost always poultry-based, while “meat meal” could contain any rendered mammalian tissue.
Vitamin premixes often use carriers like wheat middlings or corn gluten meal. Even “brewer’s yeast,” a common palatant, can trigger reactions in yeast-sensitive pets. Glycerin, used for moisture retention, sometimes originates from animal fats of unspecified species. The most insidious culprit is “tocopherols (preservative)” when sourced from soybean oil—a common allergen. Always contact manufacturers to verify the origin of these functional ingredients before introducing biscuits to your trial.
The Limited Ingredient Philosophy: Less Is More
Effective elimination diet biscuits should contain fewer than 10 ingredients total. This minimalist approach isn’t about cost-cutting—it’s about scientific control. Each additional component introduces another variable that could confound your observations. The ideal formula follows this hierarchy: rabbit protein (first ingredient), single carbohydrate source, single fat source, essential vitamins/minerals, and natural preservative.
Some therapeutic formulations achieve stability with as few as 5 ingredients, using techniques like freeze-drying or air-drying to eliminate the need for artificial binders. These ultra-limited formulas provide the highest level of confidence but often come at premium price points. During your trial, remember that ingredient count directly correlates with diagnostic clarity.
Manufacturing Standards: The Hidden Variable
Cross-contamination during production poses a significant threat to elimination diet integrity. Facilities producing rabbit biscuits on shared equipment with chicken or beef formulas can transfer protein residues at levels sufficient to trigger reactions. Look for manufacturers employing HACCP (Hazard Analysis Critical Control Point) protocols specifically for allergen management.
The gold standard is dedicated allergen-free production lines with validated cleaning procedures between runs. Some veterinary therapeutic diets are manufactured in human-food-grade facilities with stricter controls. Ask manufacturers for their “allergen control statement” and whether they conduct ELISA (Enzyme-Linked Immunosorbent Assay) testing on finished batches to verify absence of foreign proteins. This documentation separates truly therapeutic biscuits from marketing hype.
Decoding Labels Like a Veterinary Nutritionist
The Ingredient Splitting Trick
Manufacturers sometimes split ingredients (e.g., “peas, pea starch, pea protein”) to move rabbit lower on the list. Remember: ingredients are listed by pre-cooked weight. If multiple pea fractions appear, they may collectively outweigh the rabbit, making it a carbohydrate-based treat with rabbit flavoring rather than a protein-centric biscuit.
Guaranteed Analysis vs. Dry Matter
The guaranteed analysis shows minimum protein and fat percentages “as fed.” To compare biscuits accurately, convert to dry matter basis by dividing percentages by (100% - moisture %). A biscuit with 25% protein and 10% moisture actually contains 27.7% protein on a dry matter basis—crucial for ensuring adequate protein levels.
“Made in USA” vs. Sourcing Transparency
Domestic production offers better traceability, but “made in USA” doesn’t guarantee US-sourced rabbit. China dominates global rabbit meat exports, and some manufacturers use Chinese rabbit meal. While not inherently problematic, this reduces supply chain transparency. The most reputable companies provide country-of-origin statements for every ingredient.
Caloric Density: Treats Within a Therapeutic Diet
Elimination diet trials often involve calorie-restricted therapeutic foods. Rabbit biscuits must fit within this framework without exceeding daily caloric limits. A typical 50-pound dog on a trial might consume 1,000 calories daily; a single biscuit should not exceed 10-15 calories (1-1.5% of daily intake).
Calculate treat calories as a percentage of daily intake and adjust main meals accordingly. Overfeeding treats can lead to weight gain, but more critically, it can dilute the therapeutic effect of the primary elimination diet. Some manufacturers produce micro-biscuits (1-2 calories each) specifically for high-frequency reward-based training during trials, allowing you to maintain behavioral enrichment without metabolic compromise.
Timing and Dosage Protocols During Trials
Introduce rabbit biscuits only after your pet has been on the main elimination diet for 2-3 weeks and symptoms have stabilized. This establishes a clean baseline. Start with a tiny fragment—no larger than a pea—once daily for three days, monitoring for any delayed reactions. If no flare-ups occur, you can gradually increase to the manufacturer’s recommended serving.
During the initial strict phase (weeks 1-8), limit treats to 5% of total caloric intake. In the rechallenge phase (weeks 9-12), biscuits become valuable diagnostic tools. Introduce them before reintroducing the main diet’s protein source; if symptoms recur, you’ve isolated the reaction to the biscuit’s specific ingredients. This sequential approach transforms treats from simple rewards into active diagnostic instruments.
Cost-Benefit Analysis: Investing in Diagnostic Accuracy
Premium rabbit biscuits for elimination trials typically cost $15-30 per pound—substantially more than conventional treats. However, calculating true value requires considering the cost of a failed trial: repeated veterinary visits ($200-400 each), additional diagnostic tests ($500-1,500), and months of your pet’s discomfort. A $25 bag of biscuits that maintains trial integrity represents insurance for your entire diagnostic investment.
Bulk purchasing often reduces per-treat cost, but verify expiration dates—most limited-ingredient biscuits have 12-18 month shelf lives due to natural preservatives. Some manufacturers offer subscription services with veterinary oversight, ensuring consistent supply and formula stability throughout your trial period.
The Reintroduction Phase: Biscuits as Diagnostic Tools
Once your pet shows clinical improvement (reduced itching, normalized stools, resolved ear infections), the reintroduction phase begins. This is where rabbit biscuits become invaluable. Rather than reintroducing complex foods, you can test individual ingredients found in biscuits. For example, if your biscuit contains sweet potato, reintroduce plain sweet potato separately. If reactions occur, you know sweet potato is a trigger, and you can select a different carbohydrate base for maintenance treats.
This ingredient-by-ingredient approach provides granular data about your pet’s specific sensitivities, enabling you to build a truly customized long-term diet. Keep detailed logs during this phase, noting treat type, amount, and any symptoms within 72 hours. This documentation helps your veterinarian differentiate true allergies from intolerances and cross-reactions.
Veterinary Collaboration: Non-Negotiable for Success
Never begin an elimination diet trial without direct veterinary supervision, and this extends to treat selection. Your veterinarian can access veterinary-exclusive formulations not available in retail channels, often with stronger quality controls and hydrolyzed options. They may also recommend compounding pharmacies that can create custom rabbit biscuits tailored to extreme sensitivities.
Schedule a mid-trial check-in at 4-6 weeks to review treat logs and symptom patterns. Some pets require prescription-strength rabbit biscuits containing additional therapeutics like omega-3s or probiotics, which must be dosed precisely. Your vet can also provide emergency protocols if accidental exposure occurs, including antihistamine dosing and trial restart procedures.
Common Pitfalls That Derail Elimination Trials
The “Just One Bite” Fallacy
Well-meaning family members or neighbors often believe one small treat can’t hurt. During trials, even micro-exposures can trigger mast cell degranulation, releasing histamines that cause symptoms persisting 7-10 days. Educate all household members and visitors about the trial’s strictness. Consider using “medical treat” labels on biscuit containers to reinforce seriousness.
Hidden Exposures in Supplements
Many joint supplements, dental chews, and heartworm preventatives contain chicken flavoring or beef gelatin. Switch to hypoallergenic versions during trials. Some rabbit biscuits are formulated to include glucosamine from shellfish-free sources, allowing you to discontinue separate supplements that might contaminate the trial.
Environmental vs. Food Reactions
If symptoms persist despite perfect dietary control, consider environmental allergens. Rabbit biscuits won’t help if the true culprit is dust mites or pollen. Your veterinarian may recommend simultaneous environmental allergy testing or a temporary move to a hypoallergenic environment to isolate variables.
Monitoring Success: Objective Metrics Beyond Scratching
While reduced itching is the most obvious success indicator, track these objective measures: Stool score (use a 1-7 scale), ear inflammation (photograph weekly for comparison), skin lesions (measure diameter of hot spots), sleep quality (track nighttime wake-ups due to itching), and behavior (increased playfulness indicates reduced systemic inflammation).
Quality rabbit biscuits should not cause any negative changes in these metrics. If you notice increased flatulence, softer stools, or renewed scratching within 48 hours of introducing a new biscuit, discontinue immediately and reassess. Successful trials show gradual, consistent improvement across all parameters, with rabbit treats fitting seamlessly into this positive trajectory.
Long-Term Maintenance: Beyond the Trial
Once you’ve identified safe ingredients through your trial, rabbit biscuits can transition into permanent treats. However, rotate protein sources every 3-4 months to prevent new sensitivities from developing. Some pets do best staying on rabbit long-term, particularly those with multiple confirmed allergies.
Consider making homemade rabbit biscuits using the exact ingredients from your successful trial, giving you ultimate control. However, consult a veterinary nutritionist to ensure recipes are complete and balanced if treats comprise more than 10% of daily calories. The trial period teaches you which ingredients are safe; the maintenance phase is about sustainable variety without reintroducing risk.
Frequently Asked Questions
1. Can I make my own rabbit biscuits for an elimination diet trial?
Homemade treats are risky during the strict trial phase because even trace contaminants from your kitchen (flour dust, shared cutting boards) can introduce allergens. Wait until after the trial confirms safe ingredients, then use dedicated equipment and source pharmaceutical-grade ingredients if you choose to DIY.
2. How do I know if my pet is reacting to the biscuit versus environmental allergens?
Reactions to biscuits typically appear within 2-48 hours and affect the GI tract (vomiting, diarrhea) simultaneously with skin symptoms. Environmental allergies cause gradual, progressive symptoms independent of treat introduction. Keep a detailed symptom-treat log to identify patterns.
3. Are freeze-dried rabbit treats better than baked biscuits for elimination trials?
Freeze-dried pure rabbit meat (single ingredient) offers the highest purity but lacks the “biscuit” experience many owners want. Baked limited-ingredient biscuits provide enrichment through crunch and chewing but introduce more variables. For ultra-sensitive pets, start with freeze-dried, then transition to biscuits after establishing a baseline.
4. My rabbit biscuit contains “natural mixed tocopherols.” Is this safe?
It depends on the source. Soy-derived tocopherols are problematic, while sunflower or safflower-derived versions are generally safe. Contact the manufacturer for a tocopherol source statement. During strict trials, some veterinarians recommend avoiding tocopherols altogether and using tocotrienols instead.
5. Can I use rabbit biscuits for training during the elimination trial?
Yes, but adjust portion sizes dramatically. Use pea-sized fragments and factor every piece into the 5% treat allowance. For high-repetition training, consider using your pet’s main rabbit-based kibble as treats to maintain strict ingredient control while preserving the reward value.
6. What if my pet refuses rabbit biscuits?
Palatability issues are common, especially with ultra-limited formulas. Try warming the biscuit slightly to release aromas, or crumble it over the main food to create positive associations. If refusal persists after 3 days, consult your vet about prescription palatants made from the same protein source as the trial diet.
7. Are grain-free rabbit biscuits always better for elimination diets?
Not necessarily. “Grain-free” often means replaced with legumes like peas or lentils, which can be allergenic. The goal is novel, not grain-free. If your pet has never eaten barley or oats, these could be appropriate carbohydrate sources. Focus on novelty and ingredient count, not grain-free marketing.
8. How should I store rabbit biscuits to maintain trial integrity?
Store in original airtight packaging inside a secondary container to prevent pantry cross-contamination. Keep away from human food preparation areas. If you have multiple pets, store rabbit biscuits separately from other pet foods. Discard if you notice any change in odor, texture, or if the bag has been open for more than 30 days.
9. Can rabbit biscuits cause a false positive during the reintroduction phase?
If biscuits contain multiple ingredients, yes. That’s why single-carbohydrate formulas are crucial. When reintroducing, test each biscuit ingredient separately in its pure form before declaring it safe. This prevents masking reactions to one ingredient while another appears tolerated.
10. What’s the difference between rabbit allergy and rabbit intolerance, and how do biscuits help distinguish them?
True rabbit allergy involves immune-mediated reactions (IgE) causing rapid symptoms like hives or anaphylaxis. Intolerance is slower, non-immune GI upset. If your pet reacts to rabbit biscuits during a trial when no other variables exist, you’ve identified a rabbit intolerance/allergy, requiring a different novel protein. This is why starting with a pure rabbit base is critical for accurate diagnosis.