This is an adult dog that has not exhibited this type of behavior before this? Sounds like there is something wrong with your dog. I would have him checked out very carefully by a good vet. Dogs don't just suddenly change personalities. Could he have hurt himself without your knowledge? Has he been around someone who may have treated him in a way that challenged him. He could very possibly be having some sort of pain, especially if he does this when you touch him.
The fact that this is a new behavior is troubling and not likely a behavior issue. I'd get him to a vet ASAP. |