Poodle hives after switching food? Here's the fix

Hives appearing right after a food switch is a pretty clear signal — your Poodle is reacting to something in the new adult kibble, and the timing makes it straightforward to work with. True food allergies in dogs are actually less common than food intolerances, but either way the hives tell you the new food has an ingredient his system isn't happy with. The most reliable fix is an elimination diet using a novel or hydrolysed protein — something he's never eaten before, so there's no existing sensitivity to trigger a response. To point you to the right product: what's the new adult food you switched to, and do you know what protein was in his puppy kibble? Also, are the hives the only symptom, or is there any itching, paw licking, or digestive upset alongside them?

That's really helpful. Both Royal Canin Poodle formulas use chicken and wheat as primary ingredients, so you don't actually know which one he's reacting to — and since he's been on chicken his whole life, chicken is a real candidate here. The face and neck scratching alongside hives is a classic food intolerance pattern in Poodles specifically, who can be prone to skin reactions. Before you see a vet — and you should if this doesn't resolve — I'd want to get him off both chicken and wheat entirely and onto a single novel protein. What has he eaten besides Royal Canin? Any treats, chews, or table scraps with fish, lamb, or duck?

Perfect — that makes fish or lamb a clean novel protein for him, which is exactly what you need. My recommendation is Canagan Free-Run Chicken — actually, scratch that, given the chicken history I'd go with Canagan Atlantic Salmon for Dogs. It's a grain-free, single-source fish protein kibble with no chicken, no wheat, no corn. The ingredient list is clean and simple, which matters a lot when you're trying to isolate a reaction. Switch him over completely — not gradually, because a gradual transition just muddies the picture — and give it 6 to 8 weeks. If the hives and scratching clear up, you've found your culprit. If they don't improve within 3 to 4 weeks, that's when I'd push for a vet referral for allergy testing. Stop all chicken treats immediately too, otherwise the elimination won't work.

Normally yes — a slow transition protects against digestive upset. But in an elimination diet context, a gradual switch defeats the purpose because you're feeding the suspected allergen at the same time as the new food, so you can't tell what's causing what. Since he has no digestive symptoms at all, his gut is handling food fine — the reaction is purely skin-based. A cold turkey switch to Canagan Atlantic Salmon is the right call here. Some dogs get slightly loose stools for a day or two when switching abruptly, but that usually settles within 48 hours. If he develops vomiting or severe diarrhoea, slow it down — but I'd be surprised given what you've described.

It's widely available — you can get it on Amazon UK with Prime delivery, and it's stocked at most independent pet shops and Pets at Home. For a one-year-old Poodle you'd want the standard adult formula, not the puppy or large breed versions. One last thing: bin the chicken treats and replace them with something salmon or lamb-based while you're doing the trial. Even small amounts of the trigger ingredient can keep the reaction going and make it look like the new food isn't working when it actually is.