We have a 13 week old labrador who has started to drool when sleeping but it is a huge amount of fluid and I we are really concerned.  He has only started to do this 3 days ago.  Does anyone have any idea of what is causing it?  I really appreciate some help.

i would of thought possible teething but im not sure wat age they teeth from.im sure some1 more experienced in things like that will be along to help. if it is his teeth try wetting a teatowl and ringing it out and putting it in the freezer to go cold then give to the dog to teeth on ,ment to be rearly good for the gums!