We've moved into a small mobile home community, and twice now, a pretty shiny black male cat has ran inside my home. He darts in like he's been waiting for me to open the door. He seems like he is older, definitely neutered, and for sure belongs to some one, he's healthy. It isn't like I keep food and water outside, mine are indoor babies. He acts like he owns my place ha ha. Not the first time this has happened. I have accumulated a lot of cats this way. Grew up in a cat loving family.