Cockapoo puppy vomiting on every food tried

Three foods in and vomiting on every single one — that's genuinely exhausting, and I can only imagine how worried you must be about your little one. This isn't just bad luck; it's telling us something specific about what this puppy can and can't tolerate, and the good news is that pattern actually makes it easier to pinpoint the right direction. Before I suggest anything, I want to ask the right questions: what are the three foods you've already tried, and do you know the main protein source in each one? Also, is the vomiting happening right after eating or a few hours later, and is it undigested food or more of a bile/foam situation?

That's really useful — thank you. So she's reacted to chicken (Pro Plan), turkey (James Wellbeloved), and the Royal Canin which uses chicken and rice as its base too. What's striking is that all three foods contain either chicken or poultry as the main protein, which is the most common trigger for food sensitivity in puppies. It's also worth noting that Royal Canin and Pro Plan both use a fairly long ingredient list with additives, preservatives and multiple protein sources layered in, which can be hard on a sensitive gut. The undigested food coming up within an hour suggests her stomach isn't processing the food at all — it's rejecting it before digestion even gets going. Before I point you somewhere specific: has she been checked by a vet during this process? I want to make sure there's no underlying motility issue, because if she's been vomiting repeatedly over weeks, a vet visit is genuinely important alongside any food change.

Good — healthy, playful, growing, vet-cleared. That tells me this is almost certainly a sensitivity to something she's repeatedly being exposed to, rather than anything structural. Given she's reacted to every food containing poultry so far, the single most important move is switching to a novel protein — something she's never eaten before, so her system has no established reaction to it. I'd also want to go simpler: fewer ingredients, no artificial additives, highly digestible. My clear recommendation is Lily's Kitchen Puppy Recipe with Organic Chicken... actually, scratch that given the chicken history. Go straight for the Lily's Kitchen Fishy Fish Feast for puppies — it's a wet food with white fish and salmon as the sole protein, a short clean ingredient list, no chicken, no turkey, no beef. It's highly digestible, properly nutritionally complete for puppies, and it's been a real lifeline for dogs with poultry sensitivities. The wet format also means less stress on the gut compared to a dry kibble. You can find it easily on Amazon UK in multipacks. Introduce it on its own — no mixing with old food — and give it a full week before judging.

Totally valid concern, but yes — Lily's Kitchen wet food is labelled as complete and balanced for puppies, which means it meets all the nutritional requirements for growth on its own. You don't need to supplement it or combine it with anything. For a 5kg Cockapoo at five months, you're looking at roughly two to three trays a day depending on the tray size — the packaging gives weight-based feeding guides and I'd follow those precisely for now. In terms of nutrition overall: a puppy who keeps vomiting up her food is getting far less nutrition than one who eats a novel protein wet food and keeps it down. Right now, keeping food in is the nutritional priority. If the Lily's Kitchen fish recipe works well over two to three weeks, you can then think about whether you want to gradually introduce a complementary dry food — but take that one step at a time.

Really glad it helped — three rounds of vomiting is a lot to go through and you've clearly been very patient and attentive with her. The fish route genuinely gives you the best chance of a clean break from whatever's been triggering her. One last tip: keep a simple note of the first few days — did she vomit, when, what it looked like. If she's still vomiting on the fish food after five to seven days, go back to the vet with that log, because at that point you'd want to explore whether there's something beyond diet. But I'd be genuinely surprised if that's where you end up. Good luck with her — Cockapoos are wonderful little dogs.