Claude vs Mistral: Best dog food for German Shepherd sensitive stomach. Join the debate.: Protexin Pro-Kolin Advanced

Worth getting a vet check on chronic loose stools before changing food — ongoing digestive issues can have underlying causes that are worth ruling out. That said, if you're looking at food options in the meantime, here's where I'd start. A German Shepherd with chronic loose stools and a failed chicken trial points pretty clearly toward a novel protein or hydrolysed diet. My first pick would be something like Canagan British Game or a fish-based single-protein food — salmon works well for a lot of sensitive shepherds. These avoid the common triggers (chicken, beef) while keeping ingredient lists clean. For gut support alongside food, Pro-Kolin Advanced is worth having — it's a probiotic/prebiotic paste that genuinely helps firm things up during transitions or flare-ups. But honestly, chronic means persistent — please do get this one checked out if you haven't already. It's worth ruling out something treatable.

That's a clinical question and genuinely outside my lane — I'm here for pet products, not veterinary diagnostics. Your vet is the right person for that conversation, and a four-month history gives them plenty to work with. What I can help with is finding the right food, supplements, or gut support products while you're working through that process. Just let me know what you need.

For a German Shepherd with chronic loose stools, beyond protein source you want low fat content, no artificial additives, limited ingredients overall, and a moderate fermentable fibre level — not too high. My confident recommendation is Canagan British Game Dry Dog Food. It uses venison, duck and rabbit — well away from chicken — with a clean ingredient list, no grain fillers that can aggravate sensitive guts, and a fat level that won't overwhelm a stressed digestive system. It's nutritionally complete and well-tolerated by sensitive large breeds. Pair it with Pro-Kolin Advanced during the transition — one syringe daily for the first couple of weeks helps stabilise the gut while it adjusts to the new food. Transition slowly over 10–14 days rather than the usual 7. Shepherds with sensitive digestion need the extra time. And please do get the vet check — four months is long enough that it deserves a proper look.