Often times with little cresties it really hard to tell if they are eating the CGD.

Rest assured, a healthy crestie won't starve itself. You may be able to see the slightest disturbance in the food. I would try leaving the same food in for two nights too. My girls usually won't touch the CGD on the first night.

Also don't feed any crickets until you are sure he is eating, that way if there is poop, you know he is eating.