There are multiple households in our neighborhood that let their pet cats roam around outside. One cat in particular is very friendly, but it also gets to places it probably shouldn't. This past week, it went in our garage while I was outside, it has been under our car that's in the driveway, and tonight it was in our fenced-in backyard and decided to walk around on the deck. My dog loved this, of course. I fear that something bad will happen to them, and I really hope they aren't impacting the bird population in the neighborhood. My dog can't just roam the neighborhood freely, so cats shouldn't either. I would talk to the owners, but I don't exactly know which houses the cats belong to.