The first thing you need to do is to contact your 'breeder', Newfoundlands do have a protective nature, but they shouldn't be flat out aggressive. He was either poorly socialized, mistreated or badly bred. Or a combination of the three somehow. Second, get a Halti. You will now have control of your dog's head and you will be able to work with him better by keeping his attention on you and not another dog. Use positive reinforcement training, such as clicker or marker training to work with him around other dogs now. Contact a local positive reinforcement trainer or look up Dr. Yin's low-stress handling work online if you feel you can work with your dog on your own.
Answered by Anonymous - 4/29/2014 2:34:02 PM