I have pet Rabbits - one of the rabbits bites her fur around her neck and inner thigh?

Question

I have been told she is nesting because she is pregnant but how is that so when she has not been around any males. I have two females, they are in separate rooms and have had them for almost two years.
Also how long do rabbits carry their babies

Answer 1

this is what they do before they have babies they line a nest with fir to keep the babies warm as they are born without fir. The rabbit could have a false pregnancy which happens in rabbits.

Answer 2

One of my girls used to just chew on the fur around her neck like that, i think it was just a habit.

Rabbits' gestation period is 29-31 days.