With my previous attempts at breeding rats, I never produced rats with any kind of markings other than self, berkshire, and hooded. My most recent litter has quite a few marked babies. The breeding was between an amber self male to an agouti berkshire female. There are 11 females and 3 males in the litter.

So far, I have 3 females with head spots, 1 female with a blaze, and one male with a small blaze.

What are the chances of these having or carrying megacolon. Should I not hold back any of these babies as future breeders, or if they make it safely into adulthood, do you think they would be okay as breeders? I can provide pictures if needed.