You need to keep him with you and kind of treat him like you are starting training all over again. Some people tether their dog to themselves so the dog is never out of their sight. Don't wait for him to let you know when he wants to go out. Set up a regular schedule for him to go out and make sure he goes. Reward him when he does go outside. Tell the vet that he has been trained since he was a puppy and suddenly started peeing in the house and you want to make sure he does not something wrong with his kidneys or bladder. Some dogs do develop stones so I wouldn't wait on getting him checked out. |