My dog has developed a bad balance, almost drunk or stoned behavior 3 times in last two weeks. Slept until 10:30am and I thought he was almost dead. Now stumbling around somewhat coherent. Is 9 year old boxer/american bulldog
You should take him to the vet, he might have an ear infection. I had a golden retriever and she would get bad ear infections as she got older and she would stumble and lose her balance. Its a good place to start and easy to fix. Hope this helps.