I have a new sulcata hatchling that seems to be having trouble with it's back legs too...
I think my hatchling was a "preemie". It's shell where the egg yolk is absorbed is real "different". Almost 1/4 of his bottom shell wrinkled in the area where the egg yolk was absorbed.
He was dehydrated when I got him. He seems weak. He's eats like a horse, but hasn't gained weight. He drinks MASSIVE amounts of water Every Day.... He wakes up just long enough to eat and drink...and then sleeps the rest of the day.
When he walks, he just kinda shuffles on his knees with his back legs. He moves his legs well when I pick him up....and his legs will extend all the way. I'm not sure if he's just too weak to stand on them, if there's something physically wrong with his legs, if it's some sorta "hatchling failure syndrome", or if it's a symptom of something else.
I'm giving calcium supplements with his food...don't know what else to do for him....
...I'd love suggestions....
Good luck with you hatchling..... I named mine Izzy...every time I go to check on him, I wonder... IZZY (Is he) ok?
Pamela