Hello, I need some advice regarding a possibly stray cat... Last night a cat came to our window and while I opened it to water my plants she jumped into our apartment. She is very friendly and seemed well fed so we let her roam in the apartment for awhile and let her out again. She stuck around the window for awhile after that meowing to be let in, and I think during the night she left. But now, it is morning, and she is back at the window again meowing! I don't know what to do. The meowing is continuing as I write this... She also has a collar around her neck which makes me believe that she has a home, and she is so fat. I didn't feed her anything, was it a mistake for me to let her in the house? What can I do to help this poor cat? Any advice would be appreciated...