Like I said, it's not a big deal. I was simply wondering. Thanks for your replies, everyone!

I kind of figured that each snake would have a different growth rate. It's like that with humans, dogs, etc. I'm not worried about him at all, because he's got a great looking, muscular body, and has clean vet checks. Just a shot in the dark out of sheer silly curiousity.

He's eating a full grown mouse per week. I tried switching to rats of similar size, and he won't touch them. Next feeding I'm going to try again. I feed frozen/thawed, so when I got my last batch of frozen feeders, I put some of the rats in with the mice in hopes of their two scents combining to try and fool him.

Thanks again!