My doe is tearing my buck's hair out

I have a doe I bought from a stock market. She is going on 7 months old. I have a white long haired lion head buck who is 9 months. The other day I noticed my doe was pulling the buck's hair out. She didn't seem to be doing it out of aggression - she was building a nest. This morning I woke up to 6 kits in the nesting box but scattered around and not covered. After checking my doe we noticed she had pulled only a few patches of her hair but never really put it to good use. After checking them all only one was alive and after about 10 minutes it died too. Next time should I take the buck out and leave her by herself? Would it be best to leave him in there?

****Karen Sez****
It's almost always best to give the buck its own cage. And now, you may need to be planning for a second litter in 31 days from the day the rabbit kindled.

The big question is: why were the kits not mothered appropriately? Was the buck pestering her as she kindled? If the same happens to the second litter, the buck being permanently removed, it might be that the doe simply does not have strong mothering instincts.