The male rat is a husky and not a berkshire. Husky breedings routinely produce babies with megacolon issues, and being a blazed husky just adds to the risk. It will just give you carriers or very unhealthy babies that fail to thrive and either die a week or two after birth, or wait until they are weaned and then die.

Get some nice black or beige hoodeds and you won't have any problems. Or get a pair of pink-eyed whites(PEW) and you will have nice big litters of healthy babies.

That female looks to be about 5-6 weeks old. I hope you don't plan on breeding her until she is AT LEAST 4 months old, preferably 5 or 6 months. It would be like a 12 year old girl getting pregnant, it can be done, but is it the healthiest situation? No...

While they are growing up, it would be wise to get another pair and house them in same-sex groups. Having a buddy helps immensely and they will be much less likely to get sick and be stressed. They will grow faster and eat more if they have a friend to play with.

Plus, getting a normal looking male rat will significantly reduce your chances of megacolon. We already have enough of that in the good breeders' lines, why make more rats that carry the gene...