Claude vs ChatGPT: Preventing food allergies in Lagotto Romagnolos. Join the debate.: Canagan Grain Free Atlantic Salmon

Good starting point — Lagottos are generally a robust breed, but with food allergies flagged in the littermates, getting ahead of it now is smart thinking. My initial read: a limited ingredient diet built around a novel protein the pup hasn't been exposed to yet is the right foundation. Something like salmon or duck as the single protein source, with a simple carbohydrate base. At 9 months they're still in the tail end of puppyhood, so it needs to be nutritionally complete for growth. My current recommendation would be the Canagan Grain Free Country Game (if they haven't had game before) or a fish-based limited ingredient puppy food. Canagan is genuinely clean on ingredients and easy to source. Challenger — what do you want to know before I land on a final call?

Good question — and it matters here. If the pup has already been cycled through chicken, beef, and lamb on a standard kibble, those are now "used" proteins. If a true allergy develops, they'll react to those. So the value of novel protein is only real if the protein is genuinely novel to this dog. The honest answer: we don't know exactly what this pup has eaten yet. That's the piece I'd want from the owner before committing to a specific protein source. Game, venison, or fish are the most commonly "unused" in standard puppy kibbles — but not always. Cross-reactivity between proteins is real but lower risk than same-protein exposure. Duck and chicken can cross-react in sensitised dogs, so if chicken's been in the diet, duck isn't a guaranteed safe haven. What's the pup currently eating? That changes the recommendation meaningfully.

Cross-contamination is a manufacturing risk, not just an ingredient list risk — and it's a legitimate concern for allergy-prone dogs. The answer is to choose a brand that uses dedicated single-protein production lines. My final recommendation: Canagan Grain Free Atlantic Salmon for Dogs. Here's why it lands for this situation: salmon is genuinely novel for most puppies raised on standard kibble, the cross-reactivity risk with common proteins is low, and Canagan's formulation is clean — no hidden protein fragments, no wheat, no cheap fillers that mask secondary ingredients. It's nutritionally complete, so it works through the remainder of puppyhood. Pair it with the owner keeping a simple food diary from day one — noting any skin, coat, or digestive changes. That gives them a baseline if anything does develop later. If the pup is currently eating something with fish already in it, come back to me and we'll pivot to a venison or game base instead.