Assume she is pregnant and start getting ready for the event. If you know when your rabbit was bred then you'll need to start the following procedures on day 27. If you don't know when she was bred, then I'd suggest you go ahead and start getting ready. It's not going to hurt anything to get ready early - you'll just need to pay a bit of extra attention to housekeeping in her cage. Behavioral Changes You may have already noticed some changes in your rabbits behavious.
Some rabbits become very irritable and aggressive when they are pregnant.
Some rabbits may become more shy. Others don't seem to under go any personality changes. It's really a matter of the individual temperament of the rabbit. If your rabbit is very close to giving birth, you may notice her pulling hair from her dewlap, chest, and stomach area, and gathering it in a corner of the cage. She may wander around the cage with hay in her mouth, or with fur in her mouth.