I was caring for a pregnant stray cat. I built her a nest in my shed seemed pretty content. She gave birth to 2 adorable little kittens. Things seemed to be going well until yesterday. She diappeared. I haven't seen her in over 24 hours. Her kittens are about 11 days old. They cried a little this afternoon but are now quiet. What do I do? Should I try to bottle feed them? I don't know if she'll be back. I don't want them to starve but I also don't want to risk haivng the mom reject them if she does come back.