I have a german shepherd, and i live in a subdivision, I have always picked up after my dog religiously. The other day I was walking my dog and a man approached me and told me to walk my dog else where. I told him i had a bag and i always picked up after my dog. He proceeded to curse at me, and then told me he would shoot and kill my dog if he ever caught it pooping in his yard. Is he allowed to do this? Is their any thing I can do?