I'd strongly advise you to work with a knowledgeable, experienced rewards-based / force-free trainer in person. Until you can do that, this thread has very good resources for working with reactive dogs: http://www.dogforums.com/dog-training-forum/191506-links-books-blogs-etc.html
Given what you've said, I'd suspect he's fearful not protective, but someone who can evaluate the situation in person will be better able to make that determination. I'd also lay off the walks for a while. Give him time to settle in, relax, and focus on building confidence and trust. Four months isn't really long enough for him to get comfortable with his new situation.
Since he's bitten two dogs, I'd start muzzle training (The Muzzle Up Project has good information) and when you do resume walks, take him out alone so you can focus your attention on him.
There really isn't a fast fix for this, but working with a professional can help to ensure you start and remain on the most effective path. If you need help finding a trainer, just ask. We can direct you to good resources.
A few questions:
- How is he with other dogs when you walk him alone?
- What do you mean by "I tried to confront him"?
- What training have you done with him and your other dogs? What have you taught? How have you taught it?
Given what you've said, I'd suspect he's fearful not protective, but someone who can evaluate the situation in person will be better able to make that determination. I'd also lay off the walks for a while. Give him time to settle in, relax, and focus on building confidence and trust. Four months isn't really long enough for him to get comfortable with his new situation.
Since he's bitten two dogs, I'd start muzzle training (The Muzzle Up Project has good information) and when you do resume walks, take him out alone so you can focus your attention on him.
There really isn't a fast fix for this, but working with a professional can help to ensure you start and remain on the most effective path. If you need help finding a trainer, just ask. We can direct you to good resources.
A few questions:
- How is he with other dogs when you walk him alone?
- What do you mean by "I tried to confront him"?
- What training have you done with him and your other dogs? What have you taught? How have you taught it?