Okay let me fill you in. Our nextdoor neighbor, whom we've lived with in peace for at least 10 years is getting mad at us. Why? Because according to him our two cats have been using the bathroom in his yard when we let them out and he's got patches of dead grass to prove it. Both he and my father like to keep our lawns fresh and well cut when summer hits. However, our neighbor says he puts down fertillizer on the lawn for some reason and he even went to my father's job to complain about it to people. Everyone is laughing at him behind his back because apparently fertillizer doesn't help out grass in the slightest, and what's worse is that our cats thinks it's a place to use the bathroom since fertillizer has a certain smell so really he kinda dug himself a hole. Then our neighbor has resorted to putting cages around his grass to prevent more of a mess and then he has put up stakes to mark his side of the property, but the stakes are a little bit on our side. Now things are getting a little worse, now he doesn't like the tree that's also in the front lawn and this tree has been around for years now and never was a problem before. On top of it all according to my father our neighbor remarked that "we won't even know the cats are gone," to which my dad says that he's holding him responsible if the cats turn up missing. To put it simply: he's being a prick. Any ideas on what to do before my family has no cats and a lawsuit takes place?