Are you feeding her out of a bowl or bin? If the prey is free ranging you may not know for sure if she's eating at all. How long have you had her? Sometimes chams get worried about hitting their tongues on feeding bowls, but you can often get them past that by using a bigger container that they can perch on the rim and hunt from such as a Critter Keeper box. If she's new for you she may still be settling in, or possibly you are offering food differently than she's used to. Check back with the seller to see if this might be the problem. Is she showing her stress coloration a lot? Maybe something is distracting her attention. Sometimes if there are too many prey items moving around young chams just sit and stare at them, sort of mesmerized. They can't isolate and concentrate on any one of them. Often chams love shooting at flying insects such as houseflies. You can get cleanly cultured houseflies from Grubco or catch night flying moths with a porch light. These often get the shoot response going as they fly around the lights at the cage top. In the mean time, a healthy cham can easily go a week without eating much at all. She's drinking which is great. A dehydrated cham won't eat. Possibly she is borderline dehydrated and more interested in water than food. What's the humidity level in your cage?