I would take this little one to the vet. Once reptiles get sick, they loose ground pretty fast. Do you know a vet that specializes in reptiles? That is really important. Good Luck.
This is so great to talk with other Sulcata lovers. I have a guy who's approx. 3yrs old and his name is Big Mac! These guys are so cool! Such personality! As far as the pen recoperating, I agree, if you can just move it. We have a huge fenced in yard and Mac has free run of it but in the winter...