bag it, tag it and give to the local animal services alive. keep this up as the cost will give your neighbors a price to keep cat. They will either keep the cat under control or give it up. You also may sue for Vet bills in small claims court. Good luck. I have 4 Jack Russel Terriers that a neighbor hood cat teases. One of these days I may just let one loose to learn that cat it can happen. Then again I think Vet bill$!