Rottweiler puppy loose stools — probiotic advice

Probiotics can make a genuine difference for dogs — but quality and strain specificity vary enormously, and what helps one dog may do nothing for another. What breed and age is your dog, what symptoms are prompting this, and have you seen a vet about it? That context will help me point you toward something that's actually likely to work rather than just something that sells well. Actually — loose stools in a fast-growing large-breed puppy eating serious quantities of food is one of the more common gut situations I hear about, and it's often very manageable. A 7-month Rottweiler is right in that rapid growth window where the digestive system is under real pressure. Before I suggest anything, can you tell me a bit more — is this constant loose stools, or intermittent? And what are you feeding him at the moment?

Good — that's actually reassuring context. If the vet has ruled out parasites, infection, or anything structural, then what you're describing is classic high-volume digestive load on an immature gut. Rottweilers at this age are eating a lot relative to what their digestive system can efficiently process, and the gut microbiome is still maturing. The stools being consistently loose but not urgent or bloody fits that picture well. A couple of quick questions: has the consistency been like this since you got him, or did it change at some point? And have you noticed it's worse after the larger of the two meals?

That pattern makes a lot of sense. A large bolus of food in the evening is harder for an immature large-breed gut to break down efficiently — you're essentially asking a lot of the digestive system in one go. The fact it's been ongoing since 8 weeks also tells me this isn't a recent disruption, it's a baseline digestive efficiency issue. What I'd recommend here is Protexin Pro-Kolin Advanced. It's a paste that combines a proven probiotic strain (Enterococcus faecium) with kaolin and pectin, which actually help firm stools directly while the probiotic works on the underlying microbiome balance. It's specifically well-suited to dogs with persistent loose stools rather than acute diarrhoea, and it's used widely by vets in the UK. For a 7-month Rottweiler, you'd use the weight-appropriate dose once daily — I'd suggest giving it with the evening meal given that's when you're seeing the most impact. A 15ml tube will last you about two weeks at his size, so I'd get two to start and see how he responds over the first 10 days. Most owners see noticeable improvement in stool consistency within a week.

Most likely just until things settle, then periodically if needed. The goal is to give his gut microbiome some scaffolding while it matures — by 12 to 14 months, most large-breed dogs have significantly better digestive resilience and many won't need ongoing support. I'd run Pro-Kolin Advanced for three to four weeks consistently, see if stools firm up, and then taper off. If he slips back, you can use it reactively during high-stress periods — new food transitions, growth spurts, kennelling — rather than as a daily permanent fixture. A small number of dogs do better with a long-term daily probiotic, but that's something to reassess once you've seen how he responds to the initial course.

Good plan. One small tip — if you're not already splitting that evening 300g into two smaller portions (so three meals rather than two), it's worth trying alongside the Pro-Kolin. Reducing the single-meal volume even slightly can take meaningful pressure off the gut at this age. Between that and the paste, you should see a real difference within a fortnight. Good luck with him.