The high-potency option. We compared the leading allergy chews ingredient by ingredient for ShopperBear's shelves. Finn won on label transparency — but if you want the strongest formula in the category, this is it: Zesty Paws' Vet Strength line carries roughly double the colostrum and fish oil per day, plus two branded, clinically studied ingredients. It's the premium tier, priced like it.

What it supports

• Immune system function and seasonal allergy comfort
• Itching and skin sensitivity tied to histamine and environmental allergens
• Skin moisture and coat health, plus gut flora balance

Active ingredients — per 2 chews

• Colostrum (bovine) — 800 mg
• AlaskOmega® Fish Oil (omega-3 EPA & DHA for skin) — 600 mg
• EpiCor® Pets (dried yeast fermentate, clinically studied) — 250 mg
• DE111® Bacillus subtilis probiotic — 2 billion CFU
• Proprietary Immune Support Blend — 800 mg (astragalus root, quercetin dihydrate, vitamin C, L-arginine, bromelain)

One honest note: the quercetin in this formula sits inside that 800 mg blend, so its exact amount isn't published — the one place this label is less transparent than Finn's.

How to feed

• Up to 25 lbs: 1 chew daily · 26–75 lbs: 2 chews · Over 75 lbs: 3 chews
• Smoked cheese flavor soft chews. Allergy support builds with daily use over several weeks.

Quality signals

• Veterinarian formulated — the most concentrated formula in the Zesty Paws line
• Zesty Paws is an NASC member brand; three clinically studied branded ingredients (EpiCor® Pets, DE111®, AlaskOmega®)
• Backed by Zesty Paws' 100% satisfaction guarantee

Please note: contains bovine colostrum (dairy). This supplement supports skin, immune, and histamine health; it does not replace veterinary care.

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We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.


To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.


To start a return, you can contact us at our online store instant chat option. If your return is accepted, we’ll send instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted. Covering the cost of shipping the item back to us and a $20 restocking fee is required for a return to be accepted.