Rat ID Please!

I just picked this girl up from a local pet store. She was labeled as hairless. She is obviously a double rex dumbo. I also noticed her being very tiny. So I am wondering if she could be dwarf as well. I do not know her age, but her eyes are open and she is eating on her own.

Here she is next to a 3 week old rat:

https://fbcdn-photos-f-a.akamaihd.ne...66606625_n.jpg

Thanks for the assistance.

Looks like a true Hairless to me. They can look smaller than standard rats and some lines will grow slower. Doubtful it's a dwarf though. They aren't very common.

Here she (22g) is next to a 12 day old (27g female). She's double rex because she has curly whiskers and peach fuzz on her nose.

https://scontent-a-dfw.xx.fbcdn.net/...33569879_o.jpg

True Hairless can be lightly fuzzed. They often have whiskers, some facial hair, and some even have light fuzz on the genital area. All Hairless have curly whiskers, usually more tightly curled than Rex/Double Rex. ;)

Double Rex
http://i275.photobucket.com/albums/j...ps3a27d930.jpg

http://i275.photobucket.com/albums/j...pse53742f5.jpg

Hairless
http://i275.photobucket.com/albums/j...IMG_0674-1.jpg

http://i275.photobucket.com/albums/j...s/IMG_1672.jpg

This guy is a true recessive Hairless. Despite what people think, recessive hairless has to be selected for to get the cleanest adults possible. Some can be quite fuzzy.
http://i275.photobucket.com/albums/j...s/IMG_1428.jpg

Looks true hairless to me. I wouldn't expect dwarf unless she came from dwarf lines (which you would have no way of knowing). More likely she just hadn't had the greatest nutrition, ort maybe was just smaller than average.