Tara, I'm sorry Treetop has this horrid disease. {{{{{{{{{{{{{hugs}}}}}}}}}}}}
To those who want to put weight on their amp dogs, don't forget that the missing limb had weight to it, so you really don't want them at their original weight again. Also, lighter is better. Less weight (strain) on the remaining single leg. Of course I'm not talking skinny, just want to point out the obvious. Sometimes the obvious is not so obvious.
I'm thrilled that Katie and Python are doing so well!! And Python is a very pretty girl!!