Chronic Diarrhea in Dogs: Causes, Treatment & Elimination Diet Guide | AI Pets Lab
Symptom Checker
Loose or liquid stools [moderate]
Stool loses shape, puddles, or is watery. Frequency may increase.
Weight loss [severe]
Ribs or spine become more prominent, waist narrows. Dog may be eating normally or more.
Flatulence and gurgling stomach [mild]
Excessive gas sounds from abdomen, frequent passing of smelly gas.
Mucus or blood in stool [severe]
Stool covered in clear or yellow jelly, or streaks of bright red blood.
Poor coat condition [moderate]
Dull, dry fur, dandruff, or hair thinning.
Frequently Asked Questions
My dog has had diarrhea for a month and now has blood. Is this an emergency?
That's scary to see, I get it. Blood in chronic diarrhea could be from colitis or IBD, but if there's a lot of blood or your dog seems weak, it's best to go to the vet. If your dog is still acting normal, call your vet first thing.
How do I know if my dog has IBD vs food intolerance?
Great question. Both cause chronic diarrhea, but IBD often also includes vomiting, weight loss, and a poor coat. The only way to be sure is through a vet's exam and possibly an intestinal biopsy.
How long does it take for an elimination diet to work?
Most owners see improvement within 2-4 weeks. But sometimes it takes up to 8 weeks, and you have to stick with it — no treats, no chews, nothing else.
Is it worth spending money on diagnostic tests for chronic diarrhea?
It can feel expensive, but diagnosing the right cause saves money and stress in the long run. Without tests, you might spend months on the wrong diet or medication.
My dog is losing weight but still hungry. Should I be worried about cancer?
It's natural to think the worst. Weight loss with increased appetite is actually more common with EPI or IBD than cancer. Your vet can run simple bloodwork to check.
What if the elimination diet doesn't work?
Don't panic — it's not a failure. It may mean the protein source wasn't novel enough, or there's another cause like parasites or a bacterial overgrowth. Your vet can guide you to the next step.