Allergy & Immune Bites Cat Supplement
Verified Jun 17, 2026
This is a soft chew supplement for cats that combines L-lysine, yeast fermentate (EpiCor), astragalus root, and quercetin to support overall immune function. The chews are bacon-flavored with chicken and pork liver to make them more palatable for most cats. It’s designed to be given alongside a complete cat diet rather than as a primary food source.
This supplement offers a focused blend of ingredients commonly used to support immune health in cats, including lysine, yeast fermentate, and herbal/antioxidant components. The soft chew format and use of animal-based flavors make it easier to give to many cats. It’s best suited for otherwise healthy cats whose owners, together with their veterinarian, feel an immune-support supplement may be helpful.
The KibbleLab Score (1–10) is assessed from publicly available product data. Our evaluation is science-based, not marketing-based.
KibbleLab may earn an affiliate commission when you buy through a link. No one can pay for a higher score, or to change what we recommend for your pet.
At a Glance
KibbleLab Review
Strengths
- Contains L-lysine and yeast fermentate (EpiCor), both frequently used in products aimed at immune support in cats.
- Includes astragalus root and quercetin, which provide additional antioxidant and immune-focused ingredients.
- Soft chew format with chicken, pork liver, and bacon flavor may improve acceptance in picky cats.
- Formulated for cats of all ages, so dosing flexibility allows use in multi-cat households under veterinary guidance.
Considerations
- This is a supplement, not a complete and balanced diet, so it must be given along with a regular cat food that meets AAFCO standards.
- Contains chicken, pork liver, and dairy (dried cheese), which can be problem ingredients for cats with known food allergies or sensitivities to those proteins.
- Includes cane molasses, which adds sugar; while the amount per chew is small, it’s something to keep in mind for overweight cats or those prone to dental issues.
- Immune and allergy support from supplements can vary between individual cats, so it’s important to use this under your veterinarian’s guidance, especially if your cat has chronic or severe symptoms.
Full Ingredient List
Ingredients and analysis reflect manufacturer data at the time of our last update and can change without notice. Always check the actual product packaging before feeding.
Ingredient filtering helps identify compatible options but is not a substitute for a veterinary elimination diet.
Top 5 Ingredients Explained
01
Lysine
Lysine is an essential amino acid added to pet foods to ensure adequate protein quality and to balance amino-acid profiles, especially in formulas that contain plant-based or single-source proteins. It supports growth, tissue repair and immune function in both dogs and cats, is generally safe at appropriate dietary levels, but unsupervised high-dose supplementation can cause gastrointestinal upset and some claimed therapeutic uses (for example, preventing feline herpesvirus) lack strong evidence—consult your veterinarian before adding extra lysine.
02
Dried Fermentate
Dried fermentate is a dried fermentation product—typically derived from yeast or beneficial bacteria—used in pet foods as a palatant and source of bioactive postbiotic compounds (peptides, organic acids, nucleotides and B‑vitamins) that can enhance flavor and support digestive and immune health. Its nutritional contribution is usually minor but functional, improving food acceptance and supplying trace micronutrients; because composition varies with the source and processing it is not a complete protein, may contain yeast derivatives or added salts, and pets with specific sensitivities should be checked by a veterinarian.
03
Saccharomyces Cerevisiae
Saccharomyces cerevisiae is a species of yeast commonly used in pet foods and supplements as a source of protein, B-vitamins, beta‑glucans and mannan‑oligosaccharides that support digestive health, beneficial gut microbes and immune function. It is generally safe and beneficial for most dogs and cats when used as a deactivated yeast or yeast extract, though pets with specific yeast sensitivities or severely immunocompromised animals should avoid live yeast preparations and owners should consult their veterinarian if concerned.
04
Astragalus
Astragalus is an herbal botanical used in pet foods and supplements as an immune-supporting ingredient and antioxidant rather than a macronutrient; its root contains polysaccharides and flavonoids that are thought to have adaptogenic and immune-modulating effects for dogs and cats. Evidence in companion animals is limited, so benefits are modest and product quality varies; caretakers should be aware of possible gastrointestinal upset, allergic reactions, and interactions with immunosuppressive or anticoagulant medications and consult their veterinarian before use.
05
Quercetin Dihydrate
Quercetin dihydrate is a plant-derived flavonoid antioxidant commonly added to pet supplements and some functional foods for its anti-inflammatory and mast-cell stabilizing properties rather than as a traditional nutrient; in dogs and cats it is often used to help manage allergic reactions, support immune health, and reduce oxidative stress. While generally well tolerated and potentially helpful for seasonal allergies and inflammatory conditions, efficacy data in pets are limited, and it should be used under veterinary guidance because dosing, possible gastrointestinal upset, and interactions with certain medications (e.g., anticoagulants or drugs metabolized by liver enzymes) need to be considered.
Product Details & Brand
Product Specs
Brand
Zesty Paws is a leading brand in the pet supplement category offering premium-quality chews, oils, and functional treats for dogs and cats. The brand is positioned as a fun and approachable yet scientifically informed line for pet wellness, targeting pet owners seeking preventive health solutions.
Visit Zesty PawsManufacturer
Zesty Paws follows U.S. FDA regulations for pet supplements and employs manufacturing partners that comply with cGMP (Current Good Manufacturing Practices). The company emphasizes ingredient transparency and product testing to ensure quality, potency, and safety.
Manufacturing details are compiled from public sources and not independently verified; they may not reflect contract manufacturing or co-packing.
Recall History
Zesty Paws Allergy & Immune Bites Cat Supplement has no recalls since 2014.
Source: FDA Pet Food Recall Database · Monitored daily
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Frequently Asked Questions
Has Zesty Paws ever been recalled?
We have no recalls on record for Zesty Paws. We monitor the FDA Pet Food Recall Database daily.
How does KibbleLab rate foods?
Our scores are based on ingredient composition, nutritional profile, AAFCO compliance, and health considerations. We don't penalize by-products, grains, or synthetic preservatives. Brands cannot pay for higher scores.
Is KibbleLab a substitute for veterinary advice?
No. KibbleLab provides data-driven food analysis, not medical advice. Always consult your veterinarian before making dietary changes, especially for pets with health conditions.
KibbleLab provides informational content only. This is not veterinary advice. Always consult a qualified veterinarian before changing your pet's diet.
KibbleLab may earn affiliate commissions through product links. No one can pay for a higher score, or to change what we recommend for your pet.
Product data sourced from manufacturer websites, AAFCO statements, and FDA recall database. Last verified dates reflect our most recent data check.
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