Hi I have a 10 week old Wesy Highland Terrier, he went to the vet a week ago and everything checked out fine. Yesterday he started with very waterery stools and this morning I saw a little blood in it. I will be calling the Vet this morning just wondering If you know what is causing this.
Thank You,
Paula

Could be a number of things, but it definitely constitutes an emergency vet visit.

I agree could be a number of things MAKE THE APPOINTMENT. However in the mean time if you want to read this article I found it tells about several different stools and some causes do not use this to treat but to get an idea. He does need to see a vet asap. Good Luck! Diarrhea In The Dog and Cat and Its Causes in ThePetCenter.com