I actually just posted in another thread (breeding rats) too. Someone mentioned that he should be eating bigger mice. I bought him last 4th of July. He is 28 inches long which to me seems small. I can tell by his belly size that he should be able to eat larger rodents, but he's just so picky! I was explaining on the other board his eating habits. To summarize, he went almost the entire winter refusing food. After he had been eating 2 fuzzies a week, I was lucky to get him to eat 1 every 2 weeks. Around April he started eating again and moved quickly to hoppers. Around June I think he started eating 2 hoppers, and when I saw he got bigger I tried 3. He has been refusing the 3rd until about 2 weeks ago. Now he is eating 3 no problem and looking for more. I also mentioned that on top of being picky, he's kinda dumb lol. He doesn't coil like other snakes do around his prey. He wraps himself slightly and then struggles to figure out how to get it into his mouth. Sometimes he drops the mouse. If he drops it more than twice, he refuses to eat it. SO frustrating, and part of why we want to breed. Wasting a mouse that we have plenty more of is not as big of a deal.
I don't actually have a scale to weigh him right now. Mine broke and I haven't been able to get a new one. I would say the girth of his belly would be about the size, if not a little bigger than a full grown mouse. It's just how picky he is that worries me. When we first put him on hoppers, he was definitely big enough, but struggles and started refusing them for a few months and we had to go back to feeding fuzzies (4 or 5 a week) to compensate.