Kimber8787
New Member
My 1.5 year old female English mastiff Mya is very aggressive towards other dogs. She's neutered, and was socialized as a puppy. We always took her to the dog park and she was able to run around and play freely with all other dogs. She was always the shy one. When she was about one she got into her first fight with an aggressive Irish wolfhound (boyfriends dog who we lived with at the time) and ended up biting the wolfhound. I now live with my mom and her 2 labradors. Mya gets along with them just fine but I think she has made it known that she is the pack-leader. Recently my brother from out of town came to visit with his black lab Guiness. Mya seemed startled by Guiness when introduced and a day later ended up biting the lab because he went after her toy. Poor Guiness had to get surgery as the puncture wounds were pretty deep and got infected. What can I do about this behavior? I'm very worried.