When I was working for a friend tending his rental properties we used to get renters abandoning pets way too often. Cats, a lot, dogs, less often, several times birds, and 3 times coops of chickens. One time was a really supremely nice little coop with 5 silkie hens in it. They were lucky the neighbor knew they were there because it was the heart of summer and they had no water. The bosses wife who up to that point had detested chickens fell for those silkies and ended up moving them and the coop to their place.