That happens to me A LOT.
I always pick at least two from a litter that are "safe" and will later become my breeders. I think the blaze bros have the safe pass in this litter. From the last litter i kept a pure white dumbo male with red eyes and a female dumbo berkshire with white fleck patterns coming over her rib cage. Pretty cool looking siblings.
It took me weeks to get used to breeding and then feeding off, Ive got most of my snakes on f/t now so my rat breeding will be slowed down a lot.