A family member of mine has a yellowfoot tortoise that has been kept in very inadequate conditions. Its limbs seem to be feeble and it walks with a sluggish motion primarily using its front legs with its plastron and hind legs dragging on the ground. Its shell is also somewhat humped in the front.
I'm pretty sure these are indications of metabolic bone disease, probably due to inadequate UV lighting and humidity. Its living conditions have been somewhat improved, but I was wondering whether there is anything that can be done to improve its condition, or whether the deformities are likely to be permanent.