Quote Originally Posted by revxus View Post
I guess it is different with each region, here I have only 2 Petsmarts and they both only carry males. I also have 2 Petco's and they carry both genders so I buy them there instead, the local pet shop usually has sick feeder rodents that constantly wheezing and sneezing, and don't wanna even get close to that!
Sneezing in rats isnt always a cause of sickness. Rats can be picky on bedding which causes allergies. Keep in mind what a rat has a snake cant get. What effects cold blooded reptiles will not effect warm blooded and vice versa.

But its just best to breed your own if you want to get into the genetics of rats.