Xray is the only way to differentiate between a break and MBD. If its MBD weve caught it somewhat early, they may give liquid calcium, Ive seen some chams get a splint or cast with broken legs but rarely. Most are left to heal on their own.
Beyond that you need to figure out how he was able to...
Ill say it again, I still say something is going on there, that is not a natural contour. The contour im concerned with is lateral, meaning it will not show if your looking at it from the side like in your last two pictures. You've got to look at it from the front like in your original pic...
Please fill out the “how to ask for help” form and post your answers back here. Quality pictures will help us help you.
Chameleon Info:
◦ Your Chameleon - The species, sex, and age of your chameleon. How long has it been in your care?
◦ Handling - How often do you handle your chameleon?
◦...