You mean a Chinese Water Dragon? I haven't seen a crested? Unless its just something I'm not familiar with.
If its a Chinese Water Dragon we are talking about
: mine ate fine during shed. Most young ones are insectivores and will only eat crickets, mealworms, some waxworms, roaches and other insects. Make sure you dust your insects with a good calcium/phosphorous dust 2:1 ratio, and provide a good UVA/UVB light source to help process D3.
I usually fed mine morning and night, and offered greens such as turnip greens, mustard greens & collard greens. Odds are, they won't be interested in greens and as juveniles, but most will go to a more omnivorous diet as they age.
I believe we have a caresheet for Chinese Water Dragons here on the forums, I'll have to look for it and link it for you.

Also,
Tricia's Chinese Water Dragon, Reptile and Amphibian Care Page (Water Dragon care, Reptile care, Amphibian care) is a good site for info, as well.
Here's the link to the RTB caresheet for Chinese Water Dragons
http://redtailboa.net/forums/lizard/...ocincinus.html