MVB are combo bulbs that are both basking and uvb, too hot for small enclosures and chameleons seem to be able to realize when they specifically need UVB so putting it in a basking combo usually is asking for issues. At least that isn't it. He may be having poor grip today and gotten worse all of a sudden because he is stressed and is allowing his illness to show more. Honestly if it was just the hanging leg without the shaky twitch and his casque, and his eating habits... I mean resting single legs and especially alternating isn't always a huge issue and sometimes you catch it in the middle of the day during just a relaxing time. But with all the other symptoms I definitely say something is not right. He will likely get worse before he gets better and if it is something like MBD, even mild, it can take a very long time to get where it needs to be, and through out his life you will be managing it, though he can have a healthy normal lifespan
Fighting and fussy animals is always a good sign, so are normal bowel movements and eating/drinking desires. I would rather have an animal fight me on something not fun like meds, than just sit there and allow it when obviously it's against their nature.
How much did your vet prescribe of the liquid calcium?
Celebrating for even the small successes.
