I have a rabbit a female rex that gave birth to baby rabbits about 8weeks ago. There are 4 babies, i noticed today that the mother rabbit was grabbing the 8 week old babies by the side and trying to drag them under a hutch. She was showing some aggression towards the babies and was even pulling at their sides so hard she pulled out some of their fur. Why would she be pulling on her babies like that? And also i noticed that she was trying to build a nest under the hutch as well taking grass and things like she was trying to create a nest. Why would she be creating a nest ? I dont believe she is pregnant because she has not been around any other rabbits but her babies and i dont think they are old enough to mate with her. Are they? I feared she would kill the babies so i separated her from them.