Labor signs differ from one rabbit to the next...
One of my doe's actually stood and stretched her nose to the top of hercage (proping herself up with one leg on the side of her cage) and youcan see her belly tightening durring contractions.... she did this fornearly 10 hours or so. She started to pull fur 2hrs beforeshe actually kindled, then I noticed her spending more time in hernestbox.... so of course, I decided to camp out at her cage to catchthe event. I lucked out - she had them at 10pm, and not onlydid I witness the birth... I got to video tape it. She showedno labor signs with hersecond litter though.
My other doe's showed no signs what so ever until I noticed fur in the box and there were wiggly baby bunnies under it.