actually I have not had a dog dropped off in my yard in perhaps a year... a first for me.... but my neighbors have gotten many in that time.
I am collecting wild cats, however.... and loving it. They are completely wild living in the ditches and field surrounding my house.... and nightly that come to partake of the food we put out for our cat, Batman, who is an 'outdoor' cat. Batman WANTS to be outside... he's allowed inside but hates it. And he doesn't mind sharing his food but ONLY after he's had his fill. So nightly I hear a chorus of wild cats out in the shadows of the night waiting their turn.
Cats are well equipped to survive on their own.... dogs on the other hand... down right cruel to release them into the wild. - JamesJM