Yesterday there was an all black kitty outside near the garbage box, and Tigger was on top of the garbage box.

Later that day, I let Tigger inside through the window and I left it open a little...

Last night, we were sitting there watching TV and this black kitty comes half way inside the window S/he looks around and runs back out and away!

Do you think s/he has an owner? Since s/he was tame enough to almost come into our window?

Also how else can you tell if a kitty is stray? Incase I see him/her again.