Thank you for your reply. The breeder told me he was almost weaned, and that he was down to one feeding a day. He sent me home with a bag of formula mix to give him whenever he needed or wanted it. However, it became clear to me that he actually needed, and wanted, two feeds per day. We'd had the discussion of abundance feeding before I got him, but clearly he wasn't adhering to this particular philosophy for his weaning clutches.
I've been giving him 40cc's per feed, so I guess that I'm not giving him enough then. I'll bump it up today. He's doing great eating a variety of fresh veggies, fruits, pellets, and seeds, although I'm trying to wean him off those dyed Zupreem fruity pellets he came home on and onto the Harrison's. So far he's still noshing on the Zupreem ones. I'm also trying to get him off the large bill seeds, as I've been told they're not good for him over time. I'm offering him nuts as treats, and have placed a few inside his foraging toy.