Hydrolyzed protein dog food for French Bulldogs

Sensitive stomach issues in dogs usually fall into a few categories — food intolerance, ingredient sensitivity, or a gut that just needs a simpler diet — and identifying which applies is the key to finding the right food. So your vet has already pointed you toward hydrolyzed protein, which is a meaningful steer — it suggests they suspect an immune-mediated reaction rather than just a bland diet fix. To make sure we land on the right product, can you tell me: what symptoms is your Frenchie showing (skin-related, digestive, or both), what food are they currently on, and have you tried any limited-ingredient or hypoallergenic foods already?

That pattern — paw licking, facial itching, and loose stools together — is really classic for a dietary immune response in French Bulldogs. The issue with something like Pro Plan Sensitive is that it uses intact proteins, which means the immune system can still recognise and react to them even if they're easy to digest. Hydrolyzed protein works differently: the proteins are broken into fragments too small for the immune system to flag, so you essentially bypass the reaction. Before I give you a specific recommendation, one quick question: is he on any other food, treats, or chews regularly? That matters because even a small amount of the trigger protein elsewhere can undermine the whole switch.

Right, that's worth flagging to your partner — the Dreamies and table scraps will need to stop entirely while you trial the new food, at least for 8 to 12 weeks. It only takes a small amount of a reactive protein to keep the symptoms ticking over, and then you can't tell whether the new food is working or not. For the food itself, I'd recommend Royal Canin Anallergenic. It's specifically formulated with extensively hydrolyzed feather protein and hydrolyzed soy, which are both very low-reactivity sources. It also has a single carbohydrate source and is designed for exactly this dual skin-and-gut presentation. It's a vet-grade product, widely available on Amazon UK, and it's one of the few options genuinely built for elimination trial conditions rather than just marketed as sensitive. The kibble size also suits Frenchie jaw shape well.

For skin symptoms, expect 6 to 8 weeks before you see meaningful improvement — skin takes longer to turn over than gut lining does. Digestive symptoms like the loose stools can improve faster, sometimes within 2 to 3 weeks. On transitioning: normally a slow mix-in over 7 to 10 days is the right approach, but because this is an elimination trial for a suspected food allergy, mixing with his current food technically contaminates it. If his stomach is reasonably settled, switching more directly — or over just 3 to 4 days rather than 10 — gives you a cleaner read. If he's particularly sensitive, a slightly slower transition is fine, just keep it short. The main thing is that once he's fully on Anallergenic, nothing else goes in — that's when the clock really starts.

It can go either way. Some dogs stay on hydrolyzed protein long term because it keeps them comfortable and there's no reason to risk reintroducing symptoms. Others use it as a diagnostic step — once symptoms have cleared for 8 to 12 weeks, you can reintroduce single proteins one at a time to identify the specific trigger, and then find a more straightforward food that simply avoids that ingredient. Your vet is best placed to guide that reintroduction process if you want to go that route. Either way, Royal Canin Anallergenic is suitable for long-term feeding, so there's no pressure to move off it if it's working well.