My daughter's chickens have been visited by owls, skunks, dogs, foxes, hawks and who knows what else in a well built enclosure in the city. Varmints do get in. The funniest one was when DSIL was out working in the yard and he heard a commotion in the chicken house. He stepped in. A varmint stepped out. He picked up a 2 x 4 and swung. He missed. The skunk did not.
I would have a chicken house or a sewing machine house at this point either one would give me a smile as long as I don't have to live in it.