I have a white female gsd 6 months old. My roommate has a 2 yr old lab mix with maybe some rot and other things. he's very territorial so whoever she ttys to lay on the couch he will start baking and snap at her. never fully attacked but she's too young to defend herself and now she's scared to walk around the house because of him. I take her for walks all the time and she get crazy amounts of exercise. My roommate does a poor job of caring for his dog which doesn't help. I would take him for walks but he's too dumb and runs from me at the park so I cant take him off a leash. I'm not really sure what to do.