Im afraid to tell u that ur cham either has MBD (Metabolic Bone Disease) or Gout. Please take her to the vet n ask for X-rays to look at bone density or bloodwork to examine the calcium to phosphorus ratio.
Also use a fresh UVB bulb and take her out for some natural sunlight .
Take her to the vet if her legs is swollen out of nowhere.
Feed superworm as a treats...they are very addictive..gutloading and variety is the best way to go.
Hi there here is something i dug up...it might (or might not) lead to something u looking for ...
Or u can try chat with @Motherlode Chameleon
The brother's name is Jeremy...he will have for insight also
U can find him in this section...