for at least a month. But never underestimate a determined bunny, he chewed a hole in the tarp and dug underneath into her section- they were in a pen on the ground seperated by wire and pipe- but he found a way.
Make sure she doesn't get stessed in any way. Rabbits have the ability to absorb their young back into their body before they are born if stressed. They also will eat their babies if stressed after they are born. My grand parents raise rabbits and that is what she always told me. As a little girl I would want to go and hold the bunnies or babies but I couldn't because I would "spooke" them. Just thought it was something important to know, Larissa