What size should my birthing box be for a 5-6lb rabbit? i was given a 9x11 box by the old man who set me up, but it seems crowded. My rabbit gave birth to 9 kits last night. I'm concerned that some will be crushed, or perhaps it will be too crowded for them all to feed adequately. When i got the rabbit, she had a litter of 5. 1 died. I dunno how many she actually birthed because when i got her the kits were already two weeks old. I'm just worried that I'll end up burying 5/9 baby rabbits. My first doe suffered a spinal injury just days before birthing, she delivered a single stillborn and then died, I assume with the rest of her kits still inside of her. Its been a rough start for sure.