I am happy you found your kittens, it is such a worry when you care for ferals. I am caring for a stray at my husband's office, he has 2 shelters and he is offered to come inside, he lately has been staying outside, not really sure why since it is so cold, he must prefer the outdoors. But I am feeding a feral by my home, I never see her anymore but her food plate is empty every morning. I am positive it is not a raccoon because the plate is exactly where I leave it, just empty. I do not where she hides even though I have provided a shelter for her. I am planning to trap her this month and she can recuperate inside for a few days, I am positive she is a female but not sure if there are kittens out there somewhere. That is why I have put off trapping her, I am afraid she may have had kittens and I don't want them to be stranded without her until they are old enough. I'm glad you are giving those cats such good care.