Cocker Spaniel gut health & ear infections

Recurring ear infections in Cocker Spaniels and gut dysbiosis are genuinely linked more often than people realise — the same immune imbalance that lets yeast and bacteria overgrow in the gut can drive exactly what you're seeing in those ears. Probiotics can make a real difference here, but strain specificity matters enormously, and a product that helps one dog may do nothing for another. To point you in the right direction: what symptoms are you seeing beyond the ears — any digestive issues, loose stools, skin flare-ups? And has your vet confirmed the ear infections are yeast-driven, bacterial, or a mix?

That pattern — recurrent mixed ear infections, intermittent loose stools, and a dull coat — is a fairly classic picture of immune dysregulation with an underlying gut component. Your vet is right to treat the ears directly, but they're often not looking upstream at the microbiome. The loose stools confirm something is off in the gut itself, not just a surface issue. One thing worth asking your vet: has he been on repeated courses of antibiotics for the ear infections? That would compound the dysbiosis significantly.

That's almost certainly a big part of what's going on. Repeated antibiotics wipe out beneficial gut bacteria, which weakens the mucosal immune barrier, which makes him more susceptible to the next ear infection — and so the cycle continues. You need a probiotic that's specifically designed to restore diversity after antibiotic damage, with strains that have evidence behind them for both gut integrity and immune modulation, not just a generic 'digestive support' product. For a 4-year-old Cocker in this situation, I'd recommend Protexin Pro-Kolin Advanced. It contains Enterococcus faecium (a well-studied strain for dogs), combined with kaolin and pectin for gut wall support, and it's one of the few products that vets actually use themselves in post-antibiotic recovery. It comes in a palatable paste which is easy to give. It won't replace a vet conversation about the root cause, but it's the strongest over-the-counter option for what you're describing.

Good question — ideally you'd give the probiotic at least two hours away from the antibiotic dose rather than waiting until the course is finished. Some beneficial strains survive if you stagger timing, and starting sooner reduces the damage window. For a dog with his history, I'd run a full course of Pro-Kolin Advanced — typically 4 to 6 weeks — and then reassess. If his stools firm up and you see fewer ear relapses over the following three months, you've likely addressed a real underlying factor. If the ear infections continue at the same rate despite gut improvement, it's worth going back to your vet to discuss food allergy testing, since that's the other major driver in Cockers specifically.

A few things that compound the probiotic work well: adding a prebiotic fibre source like plain cooked sweet potato or a small amount of chicory root in his food gives the beneficial bacteria something to feed on. Reducing ultra-processed treats helps too — high-sugar, high-starch snacks feed yeast, which is the last thing you want with his ear history. And keep a simple diary of ear flare-ups, stool quality, and coat condition over the next two months — it gives you and your vet actual data rather than impressions, which makes any follow-up conversation much more productive. You're asking the right questions for him.