You could even feed him every 5-10 days and he'll still grow just fine. If he eats a small meal feed him sooner, If he has a large meal wait a little longer for the next feeding. I stopped weighing my feeders a while ago. Now I just feed them an appropriately sized prey item. I try to mix things up a bit and offer different prey types and sizes. Gotta be careful there though. Sometimes they'll develop preferences for one prey type over another.