For the past week, Finn has started jumping up and biting me while on walks. He has always had a problem with biting the leash and playing tug of war with it. I haven't broke him of that yet. I've tried stepping on the leash - that doesn't work, doing a leash pop - that doesn't work, and bitter apple - which only works when I spray it on and he bites right away. Now he has progressed to jumping on me and biting. I've done the whole sit and down command, which he does, but as soon as I release him he is back to biting. The biting and tug of war thing was manageable with the bitter apple, but the jumping on me and biting is something I don't know how to fix. I am just not sure how to respond to this behavior. He is 11 months old and we use a gentle leader. I am thinking about the halti, but I'm not sure if that will help the problem. These are some things that seem to set off the biting on leash and tug of war: grass cuttings, hay, walking across a street, and sticks. Though, it is not limited to these incidents. I can't really pinpoint what happens prior to the jumping and biting me. The only two incidents I can think of is when I wanted to walk across the road and he didn't want to. I pulled him halfway and he jumped up and got my arm that had the leash in it. The other time was today. We were at the park and I leashed him up. I turn to walk out the gate and he jumps and gets my upper arm. I'm not sure what the next step should be. Any suggestions? I hope this makes sense.