Hello! I have a boxer-pit mix just over a year. We got her from the shelter when she was about 4 months old. We take her out to parks as well as the dog parks to get her use to people and dogs. Now we allowed her to seat on the couch with us. Sometimes when I'm seating on our chair she jumps up and seats with me. A few weeks ago I tried to move her legs so I can have more room and she snapped at me. I was surprise because she has never done anything like that. I stepped on her tail on accident before and there was no reaction from her. Si I didn't do anything. Tonight again she was with me in the sofa, and once again I tried to move her legs and she snapped at me twice! This time my boyfriend was in the room and he got upset and kicked get off the sofa and the room. What should I do if she does it again? Is this aggression? Should I not allow her in the sofa anymore?