I have a question of my own, My mom's dog has been pacing since 2 am. She's probably 12 years old, has arthritis, partially blind, totally deaf. She keeps running into everything, and falling down, most likely from the arthritis, Any ideas what it might be besides old age? I recommended to put her in a smaller room or kennel so she calms down, but I don't have any other ideas. Update, she's walking in big circles around the room, so probably vestibular disease? No nystagmus, head tilt, or ear infection. I told her to check with her vet and get something to relax her.