I've got a nest box with four kits sitting on the kitchen table right now. The doe kindled 1/3 which I discovered prior to leaving for work that day. As the kits felt a little cool, and not a lot of fur was pulled when I found them, I brought the box to the house for the day. Now, I take the box out in the morning before leaving for work, the doe hops in feeds her young, and I bring the box back to the house. It all takes a little less than 15 minutes during which I check water, etc. for the other rabbits. As our weather has been below freezing at night and forcast to be in the low single-digits in the next couple of days, I'll probably continue this routine until the kits have furred out and the weather moderates. Better safe than sorry I say. And to think, there use to be days I could drink a cup of coffee and contemplate the day ahead before leaving for work. Rabbits and winter have put an end to that. LOL.