Quote Originally Posted by SatanicIntention View Post
The original Harley rat was found in a feeder tank in a pet store and was a siamese(or himalayan.. hard to tell).

There is a true hairless, which has NO hair whatsoever. They have alot of health problems and are generally only in labs. Then you have the fuzzy hairless, they all have short curly/kinky whiskers. Some have slight fuzzy hair, some are very hairless. It varies. Then you have the double rex/morphing hairless which generally don't have the reproduction problems that hairless and true hairless have.

DO NOT breed true hairless or hairless rats. They do not produce well, if at all, and will likely end up in miscarriage, hemorrhaging, don't lactate, or just don't know how to be a mother.
If you breed a "true hairless" (the common hairless rat, not double rex) male to a true hairless carrier female, there aren't any of the same issues as breeding a true hairless female. Some people do still breed the hairless girls, but from what I've noticed, they always have smaller litters if they're successful at raising any babies (maybe half of them died and the breeders are just leaving that part out?). You would get just as many hairless if breeding a hairless to a female hairless carrier, but without any of the risks of loosing the litter.