[ChiYorkie]

I woke up this morning and I noticed that Watson's mouth was kind of wet, not from drinking because it was wet back in the corners of his mouth. Didn't think much of it then. Just now he was taking a nap in my bed and I noticed that he was drooling so much there was a small puddle where he was laying (the size of a sand dollar). Could this be a sign of him being sick or anything. I know dogs drool, but I've never seen Watson drool or heard of yorkies drooling. Is this perfectly normal? All around his mouth is real wet!