Chinese dwarf hamsters

Question
one of chinese dwarf hamsters have got a huge bit in between its two back legs and is fat and it keeps very busy and moves all the wood chippings and is very bossy but the other one hasnt got a big bit in between its two back legs and isnt fat dosnt move all the wood chippings and just lyes in bed all day and night so we were woundering if one was a girl and one was a boy and if one was pregnant.

Answer
Dear Jade,
thank you for your question.
Chinese hamsters have huge testicles, so my ghuess would be that you have indeed one male and ome female. Here's a picture of a male chinese hamster:
http://i147.photobucket.com/albums/r294/jedediah667/hamster/MuffinfritSchabe.jpg
I recommend separating them right now. The female is probably already pregnant and they will mate again right after she gave birth. Also, Chinese hamsters are solitary and should not be kept together (they are not dwarf hamsters).

Offer the female extra nesting material and extra animal protein. The pregnancy lasts for 20-22 days and the size of a typical litter is 5-7 babies, although they can give birth to up to 12 babies. The babies should be separated into males and females once they are 29 days old because it's possible that they can mate at that age. The females can stay with their mother a bit longer and the boys can stay with each other for a while, but they will all need single homes once they are adult.
I hope I was of some help to you
Jennifer