Dog food for sensitive stomachs

A Cocker Spaniel with a food intolerance sharing a feeding area with cats — that's a specific challenge, because you're not just managing what your dog eats intentionally, but also what they might sneak from the cats' bowls. 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. To point you in the right direction, can you tell me what symptoms your Spaniel is showing (loose stools, vomiting, gas, or something else), and what foods you've already tried or ruled out?

That pattern — loose stools, occasional vomiting, not responding well to a few different foods — does point toward a genuine food intolerance rather than just a sensitive gut in general. The grain-free food not working is actually a useful clue: grain-free products often swap grains for legumes like peas or lentils, which some dogs react to just as badly. What I'd want to know next is whether any particular protein seems to cause a flare-up. Has he had chicken in most of the foods he's tried, or do you know if beef or another protein features heavily?

That's very helpful — chicken intolerance is one of the most common in dogs and it's often missed because chicken is in almost everything. The fact that he's had consistent symptoms across multiple chicken-based foods, including a grain-free version, strongly suggests chicken is the problem rather than grains or a general digestive weakness. The fix is a genuine single-protein novel protein diet — one with a meat he hasn't been exposed to much, or ideally at all. Now, the cat bowl situation does complicate things. Cat food tends to be high in fat and protein, and if he's regularly eating it, that alone can cause loose stools regardless of what his own food is. It's worth managing that separately — raised feeders, a microchip cat feeder, or simply feeding the cats somewhere he can't access. But let's sort his food first.

For a 4-year-old Cocker Spaniel with a likely chicken intolerance, I'd go with Forthglade Complete Meal Grain Free Adult Wet Dog Food in the Turkey & Brown Rice variety — or better still, their single-protein Salmon option if you want to avoid any cross-contamination risk. Forthglade's wet food is a strong choice here for a few reasons: the ingredients list is short and transparent, the protein source is clearly identified, there's no chicken anywhere in the recipe, and the wet format is generally easier on a sensitive digestive system than dry kibble. Cocker Spaniels can also be prone to pancreatitis, and wet food with a controlled fat level is a safer option than many dry foods. Start him on it gradually over 7–10 days, mixing increasing amounts into whatever he's currently eating, and keep the cats' food completely out of reach during that transition so you get a clean read on how he responds.

Yes — a few things worth tracking. In the first week, some dogs have a brief loosening of stools simply from the change in food texture and composition, so don't panic if day two or three isn't perfect. What you're looking for by week two is stools firming up and becoming more consistent, and the vomiting stopping. If he's still vomiting or the stools are getting worse after 10 days on the new food exclusively, that would suggest either salmon is also a problem protein for him, or something else is getting into his diet — most likely the cats' food. If he's doing well, stick with it for at least 6–8 weeks before drawing any conclusions, because food intolerances take time to fully clear from the system.