Agreed; waxworms are a *very* rare treat for leos, if even that. Presuming he's otherwise healthy, he'll put on enough weight on a steady diet of superworms, mealworms, and/or crickets. He only looks slightly underweight right now, nothing to be really worried about. As long as you can get him to eat consistently, he should do fine, even if the amounts don't necessarily seem like a lot.
For example, my girl put on her last 15 grams (from 60 --> 75 grams total weight) on a diet of 3 crickets every 3 days, and she didn't necessarily always eat all 3. It's not like we're talking about warm blooded animals that need a ton of food just to maintain body weight here.
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