How long have you had these guys?
How much and of what are you feeding?
I feed my guy about 10-20 1/4 to 5/8" cockroaches every 2-3 days or whenever his dish is empty. He's a growing yearling, so that's a comparison for you anyhow.
Wish I could be of more help. How gung-ho are you going to persue diagnostics right off the bat?

