Hmm. Well, if they're used to getting fed, it makes sense they're friendly with people. But I don't think they can all be runaways.

[He crosses his arms and taps the toy against his bicep.]

Some of them might've been born on the street. I mean, anywhere there's people, there's always some stray cats around. And then some could be kittens that got turned loose if the mommy and daddy cats' owners couldn't find homes for them.