Hi Lisa and Joe,
Drooling is a sign of pain or nausea, abscessed tooth or licking/eating a disagreeable substance. Check inside his mouth for any abnormalities. Feel all over him for any painful areas.
Make SURE he can urinate.
Try tuna water or milk and see if he drinks it
Try to feed him canned food or tuna. If he eats he is not feeling too bad.
Just observe him for any worsening of symptoms. If he wont eat, cant urinate or has pale gums etc he should be seen.
Please let me know how he is doing. I hope he will be fine.