This could be a couple of things. He may have a dental abscess causing the drooling or some type of obstruction in the throat or mouth. The loss of balance is a sign of a neurological issue or inner ear infection. You really need to get him into the vet so he can be started on antibiotics and treated as soon as possible. He may be mistaking the pain in his ear for a pain in his throat as they run together, so he definitely needs to be looked at by your vet. Please let me know what he finds!
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Lori McLaughlin
Your veterinarian should ALWAYS be consulted first and foremost when your pet's welfare is at stake.

