Could it be that he's eating it and you just can't tell? Keep in mind that cresties have tiny little stomachs, so it would only take a teensy amount of baby food to fill them up...especially if they're also eating crix. You could try what I do with my beardie...which is give the veggies (fruit in your case) first thing in the morning...and save the crix for later in the day. That way they don't get filled up on bugs before eating the other things they should.

And if he's a baby, I do believe they need a higher percentage of insects in their diet. I know that's true for beardies. If it needs more clarification, I'm sure Marla will help out!