I work at a family run petstore and our female veiled chameleon recently passed away and was wandering if anyone can chime in on why she may have died so that we can assure it does not happen to the next one.She was a juvenile maybe 4 inch body minus tail. Was in our care a total of 3 weeks(about) She was being kept in a exo terra 12x18 glass cage(we had a large mesh cage on order for her).All sides except front were covered in a background. She had a basking lamp which allowed her to move along her veins/sticks to that she could get up to 90f if she desired. There was also a uvb light that she could get right up to if she wanted. Her cage was furnished with veins and sticks and a few plants. Substrate was eco earth covered in bark. She had a water dish which she would drink from and we also misted the cage multiple times daily. As far as behaviour, when we first got her she was active but towards the end of things around last 5 days she would always have her eyes closed and wasn't nearly as active. She ate on a daily basis but missed 2 days food within those last five days. She was offered crickets dusted with calcium and vitamins and the occasional mealworm. Then on her final day she was looking good i checked on her and then an hour later i found her hanging upside down in her water dish dead. When i picked her up some blood was in the dish which ran out of her mouth. Does anyone know what could have happened. The owners are ordering a new one and i want to make sure this one lives a happy healthy life.