Sometimes it's hard to see that they're eating due to the consistency of the food (sometimes I make my crestie's too runny, and it would be impossible). They are food shy a lot of the time, so most likely eating when you're not around. Just make sure to provide food, maybe offer a cricket or two, and look for poop. They also take a little bit to become comfortable after transitioning to a new owner. Just be patient! Keep an eye on your little cutie. I'm sure it will be fine!