We have a 15 week old male English Mastiff. We have had him in our home for nearly 3 weeks. 80% of the time he is relaxed and so loving. The other 20% of the time he is biting us (myself, wife, and twin 3 year old boys). He will go to bite the boys' necks when they are sitting. When we correct him (with a deep firm OFF) he will growl, bark, and try to get around to the kids. He also tries to mount me while biting. We have him in puppy classes with a trainer who has giant breeds herself. She seems to think he is over the top dominant. We are concerned as he grows he will continue this dominant (or aggressive) behavior. We do not know his parents or the behavior he comes from. We are willing to do whatever it takes to help Jax become the best dog. This is our first family dog (after more research maybe a Mastiff wasn't the best choice for first time owners), but we love him dearly and want to have the gentle giant behavior, not the aggressive kind.
Thank you
Casey
Thank you
Casey