I have recently adopted a five year old male Bulldog who is delightful. However, he will not allow me to touch his face and, in particular, clean his folds. If I approach him with a cloth, his jowl quivers. As soon as I touch his face slightly, he tries to bite me. He was surrendered by a person who sprayed him in the face with vinegar to train him to obey. I suspect this training method has caused this aversion to face touching. He desperately needs his face to be cleaned, but he goes into attack mode whenever he sees a cloth approaching him. Help.