Hiya im new to this site, ive regeistered because im worried about my Robovorski hamster she about 2 years old and shares an enclosure with another female. I am worried about her because i noticed tonight that my hamster walks stops and then it looks like she tenses her belly, after that she stretches and flattens her hind to the ground, i have noticed that she has lost a little bit of wieght around the hind area ive been keeping an eye on her with that, but know this. When she walks around she walks like normal but then stops tenses up strecthes her legs out then it looks like she tries to go to the toilet moves nothing is there, she doesnt seem to be in any pain, but she has started eating less and drinking less also she is actually letting me touch her without trying to bite (been a vicous hamster since we got her) but she still goes on her wheel and runs in it before she does the strecchy thing, i have been reading on the internet it could be a vitamin d defiancy but i dont know, any advice, past expriences like this will greatly help, i cant take her to the vets yet because i havent got any money until next week at the latest. I hope she isnt on her way out , but any advice i will greatly appriciate, thank you :)