I've got a small male albino boa less than a year old whose
body gets noticably thicker after about 3 inches down. He's
still pretty small. He's very healthy and a great eater.
I've had plenty of boas and other snakes, but I don't remember
seeing a boa like that before. Usually they get progressively
thicker slowly. This guy gets thicker all of a sudden and then
his body is proportionate.
Maybe he has some Argentine blood in him? What could it be?
I'll post a pic tomorrow...

