That IMO is way too little vit d for safety. Add to that, mealworms don't have calcium stick so well to their exoskeleton compared to other feeders.
I would feed him a full meal supplemented *at least* 2x per month. And calcium daily. Actually if he were mine he'd have gotten d3 at least 1 feeding per week and calcium nearly every feeding when indoors.
IMO you have taken the fear of oversupplementation to the other extreme and undersupplemented.
It isn't exactly your fault- sounds like you were trying to do your best but interpreted some information and applied it incorrectly with the best of intentions.
Just to let you know- I've been keeping chameleons 20 years and until the past few years, I used d3 every feeding when the lizards were indoors. I never once saw a problem that could be attributed to oversupplementation of d3. And I used the strong stuff- repcal with d3. That doesn't mean that what I was doing was the greatest idea in the world, but does show that you don't need to be so afraid of oversupplementation that you take it to the other extreme and undersupplement.
After following problems on the forums here the past few years, I see stuff again and again that probably is related to undersupplementation - eye, tongue, muscle, skeletal, prolapse, egg binding problems can all be related to undersupplementation. If too much is not a good idea, it doesn't necessarily follow that too little is the way to go.
This lizard is a good case in point.
The other thing is in Alabama you should be able to keep him in an outdoor terrarium most of the year and avoid this problem of how much to give altogether. There is no reason whatsoever that if properly set up with shade availabe your chameleon could not be outdoors all this week if your temps are above 50 at night (and they probably are in your area). Mine are out 24/7 from the time nights go above 50 in the spring until they drop again in the fall. It is the best way to deal with (in addition to vet treatment) and prevent MBD. It also probably helps as a buffer against possible oversupplementation of d3 during the winter indoors...
I'm sorry if I come across as harsh. I'm just a little frustrated as I know you had the best of intentions and tried to follow ideas you may have read here on the forums about supplementation...
it is easy to damage the skin of chameleons and cause future shedding issues at the injection site...
