Okay, so I've noticed some weird behavior with my male panther chameleon. He's about three years old and I've never had any health issues with him, but within the past week or so I've noticed him having a hard time climbing in his cage and when resting on a branch he let's his front arms dangle to either side, he seem to not have much grip strength in his front paws and mostly relies on his back legs to climb. When I took him out to check and see that he was okay I noticed a bump on his wrist. Some Googling said that it may be metabolic bone disease, but I don't know how that would be possible, I change his uvb bulb every six months and I see him hanging out right under it a lot, and I dust all of his food in calcium powder with d3. I'm worried he dislocated his wrist. There isn't an exotic vet anywhere near me, but if he needs ones I'll find away to get to one. If anyone knows what is going on please let me know. For reference he lives in the XL reptibreeze and has an automatic rainfall system that goes off every two hours for 15 seconds. I haven't noticed any other sort of bumps on him, just the one on his wrist. Since I noticed his behavior I went out and bought a new 5.0 uvb bulb and new calcium powder incase something was wrong with either of them. He eats a mix of live super worms and live crickets that are dusted with calcium powder with d3. If you have any other questions let me know.