Get Your Dog Care Questions Answered by Experts
Has he had a fecal exam lately? If not, you will want to do so. The most common cause of what you are seeing is a parasite problem, coccidia or giardia. If this is the case, you can clear it up with a simple deworming.
You will want to see the vet for this today so that you can get some resolution before the weekend.
Let me know if you still have questions.
You don't always see fever or other symptoms with giardia and coccidia, two protozoan problems. Revolution does not take care of these either.