He also like to put his leash in his mouth when I try to take him out. He's fine for a while when we are walking and then he start to chew on it. I bought that Bitter stuff and spray it on it but it doesn't phase him. I also have the Gentle Leader and he is calm when he has it on. It's just when I take him out back for a quick walk. Thanks for you help. This has been my first post. Cool site too!!!!