Wow; this is weird. My '02 male, Ashes, seems to be a dwarf. He eats regularly and has no internal parasites, and is kept at optimal conditions. But he is still only around 2 feet in length; it seems that he has not grown much in a year!
Maybe he is a dwarf? He has a great appetite, feeding on hopper rats, and a nice muscular body structure. But he still seems to be smaller than he should be.