You really should get rid of the substrate. Veileds eat all kinds of things and if it's not on purpose, it's on accident. It would be easy for Sputnik to shoot at a cricket and pick up some of that substrate with his sticky tongue. It could choke him or cause impaction.
Also, a note on the...
Some stuff I keep on a text document found here at the forum blogs.
https://www.chameleonforums.com/threads/gutloads-and-feeder-stuff.140864/
The "wet" portion of the gutload, which should be your principle gutload, can includes things like (switch it up with a different couple of items every...
How many live plants do you have in there? What kind of Humidity Monitor do you have, is it working? Having several live plants will help with humidity. If they aren't enough you can cover 1-3 sides of the mesh cage and that should do it. Some people use shower curtains, some coroplast. Start...
I guess in a way you're right. As in they have no appetite for whatever you're offering and or because they're not feeling well. Not to fast though. :D
I know my post wasn't helpful but I honestly thought there would be a reply by now saying something to the effect of "I see the error in my ways and I'm currently working towards solutions to separate all these animals" but instead there's a post about spraying dirty poop laden, possibly toxic...
I may be wrong here but don't only humans "fast"? As in make a conscious decision to not eat or drink, usually for spiritual reasons, "health", or protest for usually a short period of time? It would seem so to me. o_O
LIttle tip in case you missed it or didn't know. When you mist, do it for a while, a few minutes. That can trigger, in manner of speaking, your cham to drink. It's better if it's white, a little yellow happens, orange/dark yellow is not cool. I left you a link to get acquainted with poop 101...
I don't see the dry patch in the picture but it could be he's starting to shed. Maybe put up a better picture to be sure. Chameleons often don't drink in front of people, some do. The way you know is by their poop, or rather their urate. White means hydrated, yellow means not so hydrated...
You can cup feed him, use a deep cup for crickets and most should stay in. You can also raise the floor, if I remember right you have a Reptibreeze, right? That gives him a smaller hunting area but that Corn Plant would have to go temporarily I suppose. You could also go for Phoenix worms...
I use a Corn Plant as well. I heard they love the flowers, not that I've seen any yet, if ever. According to the safe list (the one we had here, no warnings, just labeled safe) they're safer than Pothos, which I also use. My girl tried to eat it when I first got it but she's since given up. It's...
Gwendalyn, Is that substrate? If so, you may want to remove it. It could get in her eyes, she could eat it on purpose or by accident. It can lead to impaction. If not, apologies. (y)