my law teacher went over a case like this once. neighbors sued another neighbor for a constantly barking job. it was ruled that the other neighbors were unable to enjoy their private property with the dog constantly barking, so the dog owners had 3 options: move, get rid of the dog, or have the dog's vocal cords removed. the owner's chose the latter, and the dog could no longer bark. but you can't do that anymore because of assholes like PETA.
so maybe you should sue them?