The neighbor trespassed. If the animal comes back to your side, grab it, and call animal control. You might also make a police report. If the animal continues to do that, do not hurt it. It is an animal and works on instinct. If the neighbor refuses to leash the animal, you might capture it and drive 100 miles away and drop it off in a forest somewhere. Then, play innocent if the neighbor inquires. There is a legal concept called "self help." If the "system" can't or won't help, you can do it yourself. I honestly am not sure if there would be legal ramifications in this situation, so it might be worth speaking to a local lawyer in case your jurisdiction has different rules than mine does.
Answered on Oct 31st, 2012 at 4:13 PM