He is 13, I've had him for 3 years, a rescue dog. He was laid on couch then stood up, vomited and peed on the couch. He jumped off to go the room and seemed to be struggling to keep his balance, walking sideways as such. I let him out the back door and he squatted to pee. He never squats. Eating grass. He has never peed in the house before either. I'm going to make an appointment at the vets but what could have caused this? Any ideas?