Bulldog Has Become Afraid Of MenMy 10 month old American Bulldog is beginning to act afraid of people, not all people just certain men. Some men he's fine with, but he randomly freaks out when certain men try to pet him. I'm not sure what to do about this. At first I thought he was a good judge of character, but lately he's been acting afraid of almost every man that tries to pet him. He even will growl or bark if the person is persistent. Any advice?