Are they living in a fake tree in a enclosure? Or are the living in a "free range" environment (no cage)?
Are they living on the same tree/in the same cage?
I would stop putting them in a seperate enclosure to eat. try cup feeding, placing the feeders in a small cup/bowl that is within reach of the animals so the can stay in their "home" im sure i would not eat if everyday someone picked me up put me in an unfamilar place to eat.
how old are they?
what type of lighting are you using? UV lighting?
how are you hydrating them? Misting, drippers?
Try filling this out
Cage Info:
* Cage Type - Describe your cage construction (Glass, Screen, Combo?) What are the dimensions?
* Lighting - What brand, model, and type of lighting are you using? What is your daily lighting schedule?
* Temperature - What temp range have you created (cage floor to basking spot)? Lowest overnight temp? How do you measure these temps?
* Humidity - What are your humidity levels? How are you creating and maintaining these levels? What do you use to measure humidity?
* Plants - Are you using live plants? If so, what kind?
* Location - Where is your cage located? Is it near any fans, air vents, or high traffic areas? At what height is the top of the cage relative to your room floor?
Chameleon Info:
* Your Chameleon - The species, sex, and age of your chameleon. How long has it been in your care?
* Handling - How often do you handle your chameleon?
* Feeding - What are you feeding your cham? What amount? What is the schedule? How are you gut-loading your feeders?
* Supplements - What brand and type of calcium and vitamin products are you dusting your feeders with and what is the schedule?
* Watering - What kind of watering technique do you use? How often and how long to you mist? Do you see your chameleon drinking?
* Fecal Description - Briefly note colors and consistency from recent droppings. Has this chameleon ever been tested for parasites?
* History - Any previous information about your cham that might be useful to others when trying to help you.
* Current Problem - The current problem that you are concerned about.