Recently, a cat has been visiting my backyard, and its presence is starting to concern me. A large portion of my backyard consists of an enclosure for my rabbits, which is also where my hen usually stays. Cats have come into my backyard before, but I do not think that my rabbits are in extreme danger when this happens. Now that I own a chicken, though, I am far more worried about the situation. Just this morning, I saw the cat lying atop a compost bin; seemingly using it as a vantage point to look into their enclosure. I would put my hen in her coop, but she always becomes restless and angry when I do, probably because of her lack of freedom. Is there anything that I can do about this? Thanks in advance to any help.