Thank you everyone for your input! I just wanted to update and let you all know that he finally ate! I got him a mouse that was a little smaller than normal this afternoon and offered it to him. I had noticed the past week or so that he had been extremely active in his tank at all hours of the day. This used to be his way of telling me that he was hungry. So I went and got him food and within two seconds of dropping it into his feeding box he went for it. He was just confused by having it in his tank before. So I decided to go back to trying his feeding box and it worked! Hopefully he keeps it up and eats every week like he used to!

I'm so relieved. Maybe he was just going through a phase. But either way, he's not a voracious enough eater to reach the size I'd like him to be, I don't think. Oh well. He'll just be my munchkin forever.