b4 the fur gone.. the ear willg one 1st..

BTW if the leg just shrivelled and fell off, then it most probably is a genetic disease. More like a genetic defect. I've seen inbred robos born with 4 legs but ended up having 2 back legs lame after a certain age (no accidents involved. And luckily not mine. )

I think your WW is not used to your scent. You don't handle her as often as your parents? My hamsters are tamest when I handle them because I handle them to most. It applies for both syrians and robos so I think i applies to all hamsters.

When you catch her, scoop her up with 2 hands. Or train her to jump into your hand. If a fully tamed hamster has 10 points, chasing them all over the tank with your hand trying to catch them reduces trust point down by 2 or 3.  I'm lazy to scoop them one by one (my robos back then) so I train them to jump on my hand in a whole group. The I just lift and deposit them in a spare tank while I clean their tank.

And yes, I think you're very kind to adopt a hamster with special needs and only has 3 legs. I said pink skin because hamsters (normal ones) have fur dense enough to cover their skin. Inbred robos have pink skin (in the sense that I can see the skin beneath the fur just by looking. In other words, fur too little).