I knew a vet when I lived in Derbyshire who came to the pub on his horse.You would be better going to a vet rather than some of the quacks here, some are pissed when you go in, true.
He was an alcoholic and always went home stone drunk.
The reason he always came on the horse instead of driving was because the horse knew the way home on its own, regardless what state the rider was in.
PS. That's a 100% true story. It was hilarious sometimes watching him climbing into the saddle at chucking out time