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I have a 3-1/2 yo Jack Russell. I inherited him from daughter who bough thim from petland. she could no longer keep him in the place she moved into so he has been with me for over 6 months now. I love him dearly, but he is aggresive towards other people, growls, will bite, and has turned on me quite a bit. I do know my daughters ex-boyfriend and dad teased him, and I think he was teased with a dirtbike because I own two motorcycles and he goes ballistic when i even go near them or start them up. My fiancee' wants him gone, which i don't blame her, but I am sure if i give him away or take him to the pound he will be destroyed for his aggression. What can i do to change this aggression? I have tried love, calmness, praise, I play ball with him, he fed regularly, He is an attention hound ( no pun intended) and i try to give as much a s i can. I cannot go anywhere, even walk to another room without him following me, including go to the store, or if i go to work he barks crazy for 30 minutes.
We are at wits end with him, but for some reason i cannot part with him.