Chicken: the everyday allergen hiding in everything
by Ben, co-founder

Ask people to guess what dogs are allergic to and they'll say grain. Ask the published studies and the answer is meat - specifically the meats dogs eat most. In the pooled reviews of confirmed cases, beef leads, with dairy and chicken close behind. Grain barely troubles the scorers.
Common doesn't mean sinister
Chicken isn't a bad ingredient. It tops the allergy tables for the same reason English tops the "languages spoken in England" table: exposure. An immune system can only develop a reaction to a protein it meets, and most dogs meet chicken every day of their lives. Feed every dog on venison for a decade and venison would top the list instead.
Where chicken hides
- "Meat and animal derivatives" - the legal catch-all can lawfully contain poultry, whatever meat the front of the bag advertises.
- "Flavourings" - often meat-derived, rarely specified.
- Dental chews and treats - many are meat-flavoured even when they look like toothbrushes.
- Flavoured medications - the meaty flea and worm chews are the classic trial-breaker.
- Other pets' bowls - the cat's chicken dinner counts.
This is why "we tried a chicken-free food and nothing changed" often means nothing changed about the chicken. Unless the label names every protein, you can't actually know it's gone.
What to do about a suspect
Don't play whack-a-mole across the supermarket shelf. Pick a food built on a single protein your dog has genuinely never eaten, check the whole label using the five-minute method, and run the full eight weeks. If chicken was the problem, you'll know - and if it wasn't, you've ruled food out properly instead of forever wondering.
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