Dog food for Chow Chow with hypothyroidism & sensitive gut

A senior Chow Chow managing mild hypothyroidism through diet while also dealing with a sensitive gut — that's a specific balancing act, and it matters a lot to get the food right. Sensitive stomach issues in dogs usually come down to food intolerance, ingredient sensitivity, or a digestive system that simply does better on something plainer. With hypothyroidism in the mix, you also want to be mindful of soy-heavy or overly processed formulas, which can interfere with thyroid function. To help me point you in the right direction: what symptoms are showing up most — loose stools, vomiting, gas? And what has he or she been eating so far?

That's useful context. Loose stools in the morning specifically often point to the food not being fully digested overnight — which in a senior dog with a sluggish thyroid makes sense, since metabolism and gut motility can both slow down together. The fact that a basic chicken and rice dry food isn't settling her suggests the issue might be more about digestibility and fibre balance than the protein source itself. A couple of quick questions: does she have any known reactions to specific proteins like beef or fish? And is she at a healthy weight, or has the hypothyroidism caused any weight gain?

That all fits together clearly. The weight gain tells me you want something with controlled calorie density and good fibre to support digestion without overloading her system. Soy is worth avoiding given the thyroid management, and you want highly digestible ingredients rather than a long, complex list. My recommendation is Hill's Science Plan Adult 7+ Sensitive Stomach & Skin with Chicken — the large breed senior version is the right fit here. It's formulated specifically for digestive sensitivity with prebiotic fibre and highly digestible proteins, it's soy-free, and the calorie content is appropriate for a senior dog carrying a little extra weight. It's also a Hill's product, so if your vet is already familiar with the brand for her thyroid management, it's easy to have that conversation with them. Transition slowly — about ten days mixing old and new — and you should start to see the morning loose stools improve within two to three weeks.

It's readily available on Amazon UK and through most pet retailers, so no trouble sourcing it. On the thyroid question — yes, there are a few things worth knowing. Soy is the main one; it can interfere with thyroid hormone absorption, which is why it's worth checking labels carefully on any food you consider. Some raw cruciferous vegetables like broccoli and kale can also be mildly goitrogenic in very large amounts, but at normal dietary levels in a commercial dry food that's not a meaningful concern. The Hill's formula avoids soy, keeps the ingredient list clean, and is designed with senior metabolic needs in mind — so it should work with her thyroid situation rather than against it. Keep your vet updated as you transition, since any improvement in digestion and weight is worth noting in the context of her overall management.

Good luck with her. Slow and steady on the transition and she should settle well on it. If the loose stools persist beyond three weeks on the new food, it's worth going back to your vet to rule out anything else going on — but based on what you've described, a more digestible, soy-free senior formula is the right move.