I have a German Sheppard 10 years old..he wieghs 60 pounds,,,This morning i was bathin him, and he started yelling , running in circles, fell to the ground and had what appeared to be a seizure, foaming at the mouth, and stretching all his legs way out, Eventually he got up, and seemed to b blind, i helped him in his pen where he ran in circles for about 30 minutes solid, now he seems extremely disoriented.What could of happened and what should i do?, His regular vet, is on vacation.thank you!!

Optional Information:
Age: 10; Male; Breed: German Sheppard

Already Tried:
I gave him water