as above; these guys are incredibly unpredictable feeders. Sometimes they're agressive feeders and go through moments of constant, glutonous feeding. Then, you can have periods of never seeing them eat. I'm in one of those periods and can say that in the last 2 months, I've never seen him eat. But, if you're desperate to be certain he's eating, my big guy's recent thing is large Locusts and big crickets and because of the competition in my tank, he goes for them quite quickly.