Momma cat won't stay with them, I don't even know if she's feeding them (she still has milk). They were very weak and very cold this morning when I went to check on them (it froze last night, temps in the low 30's). I have the suspicion that she either didn't lay with them last night or she only briefly nursed them during the night and left them again. I brought them to work with me (they're sleeping contentedly with a heater blowing on them) I tried to feed them earlier (after having stopped at the store for milk replacer & a bottle), but it's difficult since a bottle isn't what they're wanting. Anyone have any tips on how to make feeding them easier?