A couple of years ago my girlfriend got bit by her dog. Seemingly for no appaernt reason and it was pretty bad. He was only about 5 years old. She took him to the vet the same day as he had not been acting normal and they kept him and after 2 days in the hospital he died. I don't remember what was wrong with him but the bottom line is...
Please try the vet before worring about further training. Somthing really may be hurting him. I especially wonder because you say he won't let you take off or put on his harness. sounds like something is bothering him.
Kim |