This is a specific conversation about Dog food allergies — identifying and fixing them — ask about yours and get one honest answer for your exact situation.
inparticular.ai
Intermittent vomiting in a young puppy that seems tied to their kibble is really worth getting on top of quickly — true food allergies are actually less common than intolerances, but either way the most reliable fix is an elimination diet using a novel or hydrolysed protein. Before I point you in the right direction, it helps to know a bit more: what breed and age is your pup, what symptoms are you seeing exactly, and have you already tried switching foods or spoken to a vet about it?
He's a 5-month-old Bernese Mountain Dog. He vomits maybe twice a week, usually an hour or two after eating. No blood or anything alarming, but it's definitely linked to meals. He's on a standard chicken-based puppy kibble. Haven't tried an elimination diet yet and the vet said it could be a food intolerance but didn't prescribe anything specific.
inparticular.ai
That timing — vomiting one to two hours post-meal — is a classic sign of a dietary intolerance rather than a structural issue, which is reassuring. Chicken is actually one of the more common culprits because it's in so many standard kibbles and dogs can become sensitised to proteins they've eaten repeatedly. Has he been on chicken-based food since you got him, or did you switch at any point? And is he otherwise lively, gaining weight normally, and are his stools solid?
Yes, he's been on chicken since we got him at 8 weeks. He's energetic and growing well, stools are mostly fine. Just the vomiting that's the issue.
inparticular.ai
That confirms the picture — he's healthy overall, so this really does point to a chicken intolerance building over time through repeated exposure. At five months his gut is still maturing too, which can lower the threshold. The right move is a proper elimination diet: one novel protein he's never eaten before, nothing else, for six to eight weeks. Given his size and age, I'd recommend Forthglade Natural Grain Free Puppy food in the Turkey & Potato variety. It's a complete wet food with a single novel protein, no chicken, no common allergens, and it's properly balanced for large breed puppies which matters a lot for a Berner at this stage. Turkey is well tolerated and genuinely novel for a dog who's only ever had chicken. Switch over gradually over five to seven days, then hold it steady for the full elimination period. If the vomiting stops, you've found your answer.
That sounds sensible. Should I be worried about him not getting the right nutrition during the elimination diet if he's only on one food?
inparticular.ai
It's a fair concern, but Forthglade's puppy range is a complete food, meaning it meets all nutritional requirements on its own — you don't need to add anything. The Turkey & Potato recipe is specifically formulated to be balanced, so he won't be missing out. The one thing I'd flag for a large breed puppy is calcium-to-phosphorus ratio: Bernese Mountain Dogs are prone to developmental bone issues if nutrition is off during growth. Forthglade puppy hits the right balance for that. Stick to the recommended feeding amounts for his weight, and you're good. If he's still vomiting after eight weeks on a clean novel protein diet, go back to the vet — at that point it's worth ruling out other causes.
Great, I'll give it a go. Where can I get it?
inparticular.ai
It's widely available on Amazon UK — search for Forthglade Natural Grain Free Puppy Turkey and you'll find it in multipacks which work out cheaper per tray. For a five-month-old Berner you'll likely need the larger quantity packs as he'll be eating a decent amount already and only getting bigger. Buy enough to last the full eight weeks so you're not tempted to rotate proteins mid-trial. Good luck — this is genuinely the most effective way to sort it, and you're doing the right thing catching it early.
