What causes drooling in dogs?

Answer:
Dogs sweat by panting with their mouths wide open and their tongues hanging out, and dogs who get decent excersise (excuse me i know i spelled it wrong) would be sweating a lot, and whether they notice it or not there is always drool dripping off their tongues and from the corners of their mouths.
Note: There are comments associated with this question. See the discussion page to add to the conversation.
First answer by Sweet as sugar18. Last edit by Sweet as sugar18. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 0 [recommend question].