Are you sure your crickets or other feeders aren't feeding on your Veiled while it sleeps...I believe he is a she but a pic of the back feet would help. You need to take the cham to a vet before an infection sets in and deteriorate it's health or worse!
No one was "Barking that shit" just trying to help out, been doing this a LONG time but hey your cham you do what's best, I mean you purchased a sick chameleon knowing it was housed with one that had a RI so what do I know.
No it not normal for them to become lazy and stop using their tongue, sounds like something is off, maybe someone else will chime in, usually it's some kind of nutrional/vitamins deficiency, pics and filling out the help sheet will help out.
No spurs on the back feet. Calcium every feeding, vitamin D3 twice a month and vitamins twice a month. Are you gutloading your crickets and do you plan on using other feeders besides crickets?
Looks like a lady...What are you feeding the crickets? What type of calcium and vitamins are you giving her? You don't need the blue light, just a regular bulb.