You may have heard about "dwarf" type D. couperi, several have been reported, about that length but often stouter than one would expect. They appear healthy otherwise, but are generally not chosen for breeders. I assume they are genetic "sports", or perhaps the short end of normal? Anyway, your cribo may exhibit the same. Some have suggested it is the result of inbreeding, but I am not convinced that is always the case. Is your animal length/girth proportional or is it "stout"? This is the first I have heard of this in a cribo.

I feed my Drys more often, but I doubt if that is what is limiting the size. Insufficient food after 7 years would probably result in a long, thin snake. Our captives tend to be thicker than wild caught animals. Interesting case...Vic