I agree about feral cats (and feral dogs). Coyotes will sometimes breed with dogs. We had a problem years ago with "coydogs". Someone near our place apparently had a Manx cat for we saw several feral cats with bob tails but haven't seen one in years. We have cat/dog doors which save a lot of trouble/mess in the house. My chickens are "free range" - automatic chicken door on the henhouse opens in the morning and closes at night. They are also "pets". Last week I found two eggs on my workbench in the garage. Chickens roam around when the door is open, picking up bugs and pecking at clear plastic jugs of wildbird seed I keep there. I trained them with peanuts and come when I call or follow me around. I started keeping the garage door closed mostly but one hen uses the cat door to get into the garage and subsequently to her "nest" on the workbench. "Management" (wife) said to let her lay eggs there so they'd be easy to find. Cats pay no attention to hens but do go into the henhouse for mice. Now that harvest season is here, mice and voles are everywhere. Both cats are busy doing their thing, as are the dogs. Hawks and owls, too. Saw two mature bald eagles going into town feeding on a roadkill raccoon.