Why does my boxer become aggressive when on lead and passing another dog on lead?
Why does my boxer become aggressive when on lead and passing another dog on lead? General Dog Discussions
My boxer is so friendly and daily is on the field socialising with other dogs. It is only when he is on the leash and sees another dog passing on a lead. He is on a haltie but jumps up and is aggressive with his heckles up and looks like a dangerous dog. This can also happen when he is off the lead and another dog is on the lead when he can become aggressive (the dog on a lead on open ground may indicate a nervous dog and my dog is trying to be top dog?). Please help