I'm also kind of worried about how small they are. I can feel their spine, ribs, and hip-bones really well. And they only gained a gram since yesterday. The lady at the vets office told one of the workers at the shelter that they hadn't eaten in three days, which I didn't think was possible. I don't really have much background on them other than that they were born on Friday. They're both really strong, though, and can move themselves around without a problem. Maybe I'm just worrying too much.