Are you feeding them rabbit food??

And yes, that's alot of blood for a normal birth. Should just be tiny spots, if that.

I would refrain from breeding her. She's high white, which means she has a high likelihood of carrying the megacolon gene. Megacolon kills, and not quickly. If any of her pinks survive and are marked, I wouldn't use them for breeding either. Just too much of a risk, especially if she had trouble birthing. Kind of like cattle, it seems to be one of those genetic things.