Stress colitis in working ACDs

Stress colitis in a working dog is a genuinely tricky problem — it's not a simple gut imbalance you can just supplement away, because the trigger is environmental and recurring. Probiotics can make a real difference here, but quality and strain specificity vary enormously, and what helps one dog may do nothing for another. To point you toward something that's actually likely to help: what breed and age is your dog, what symptoms are you seeing, and have you had a vet confirm the stress colitis diagnosis?

That makes complete sense — you can't just retire a working ACD from the thing he's built for. Stress colitis in high-drive herding dogs is well recognised: the gut-brain axis is genuinely overactive in these breeds, and the physical and psychological intensity of trial environments hits the gut hard. Mucus and occasional blood in loose stools is classic. The vet is right that diet and stress reduction are the levers, but since stress reduction isn't fully on the table, gut resilience becomes the goal. Before I recommend anything: is the bleeding fresh red blood on the surface of the stool, and does it resolve within a day or two after the event?

Good — that pattern is consistent with stress colitis rather than something more serious, and the fact it resolves predictably is reassuring. What you're dealing with is a gut lining that becomes hypersensitive and inflamed under acute stress. For this specific situation, I'd recommend Protexin Pro-Kolin Advanced. It's a paste formulation that combines a clinically researched probiotic strain — Enterococcus faecium SF68, which has genuine evidence behind it for stress-related GI upset — with kaolin and pectin, which physically soothe and protect the gut lining during flare-ups. It's also got prebiotic support to maintain the microbiome. Critically, it comes in a syringe so you can dose precisely before and during events as a preventive measure, not just reactively. Many working dog handlers use it exactly this way. It won't eliminate the stress response, but it significantly cushions the gut's reaction to it.

Pre-emptively, ideally starting the evening before a trial and then again on the morning of the event — that gives the kaolin and pectin a chance to create a protective coating before the stress hits. If you know a particularly intense multi-day trial is coming, some handlers will give it for two or three days beforehand. You can continue dosing reactively too if symptoms flare, but the protective approach tends to produce noticeably better outcomes for dogs with a known, predictable trigger like yours. Keep your vet in the loop on your protocol, especially given the history of blood in the stool — it's worth a check-in if the pattern ever changes or the recovery time lengthens.

Good plan — give it at least two or three events to assess properly, since one data point won't tell you much. If you find it helps with the acute flares but he still seems unsettled between events, it's worth revisiting diet too — some high-drive dogs do better on a lower-residue food during trial season. But start with the Pro-Kolin Advanced and see how he responds. Hope the next competition goes well for both of you.