Best probiotic for Bichon Frise with food sensitivity

That's actually a really positive starting point — your vet has already done the hard work of identifying food sensitivity triggers, and recommending a probiotic on the back of that is a considered, targeted move rather than a shot in the dark. Probiotics can make a genuine difference for dogs with digestive sensitivity, but quality and strain specificity vary enormously, and what helps one dog may do nothing for another. Before I point you toward something specific, a couple of quick questions: what symptoms was your Bichon showing that led to the sensitivity diagnosis — loose stools, vomiting, skin flare-ups, or something else? And did your vet mention any particular strains or just say 'try a probiotic'?

That's a classic gut dysbiosis picture alongside a dietary transition — exactly the scenario where a well-chosen probiotic earns its place. Loose stools and vomiting during a food switch can spiral if the gut microbiome is already compromised, so supporting it actively makes real sense. Can I ask what she currently weighs, and is she otherwise healthy — no ongoing antibiotics or other medications that might interact?

Perfect — that's really helpful. For a 4-year-old Bichon at that weight, going through a dietary transition with a history of food-triggered loose stools and vomiting, I'd point you toward Purina Pro Plan FortiFlora for Dogs. It's the probiotic most commonly recommended by vets in exactly this type of situation, and there's a good reason for that: it contains a well-studied strain called Enterococcus faecium SF68, which has solid clinical evidence behind it for reducing the duration and severity of diarrhoea in dogs. It comes as individual sachets — one per day sprinkled over food — which makes dosing precise and consistent, and sensitive dogs tend to find the palatability good, so no battles at mealtimes. It won't address the underlying sensitivity, but paired with the limited ingredient diet your vet has recommended, it gives her gut flora the best chance to stabilise during the transition. One sachet daily for at least 4 weeks is the standard approach; some owners continue longer term if the dog remains sensitive. You can find it easily on Amazon UK — look for the box of 30 sachets, which covers a full month.

Realistically, most owners notice an improvement in stool consistency within 5 to 10 days, though some dogs respond faster. If you're also transitioning her food at the same time, do it slowly — swap about 25% of the old food for new every 3 to 4 days over a couple of weeks rather than switching overnight. That combination of a gradual dietary transition plus FortiFlora gives her system the gentlest possible adjustment. If after 3 weeks you're still seeing loose stools more than a couple of times a week, go back to your vet — it may indicate the new diet still contains a trigger ingredient, or that something else is going on.

That sounds like exactly the right plan. Keep a simple log of her stools for the first two weeks — even just a quick note on your phone — so you have something concrete to share with your vet at the follow-up. It makes it much easier to assess whether the probiotic and the diet change are doing their job. Good luck with her — Bichons are resilient little dogs, and with the right support she should settle down well.