AFter a routine visit to the park today my dog began to drool excessively, to the point where drool was literally dripping out of the corners of her mouth. (She never drools.) I pried open her mouth to check her teeth to make sure something hadn't gotten stuck somewhere, but could see nothing. I can't take her to the vet until tomorrow (well, I could take her to the emergency vet, but she doesn't seem to be in pain or anything). Any ideas as to what could have caused this?