the looseness of the skin and the thickness going from mid body to tail. It's easier to explain how to identify an obese python than it is trying to explain how to see one that's a bit underweight, lol. That and the fact that it's almost a year old and looks to only be about 3 feet. It doesn't seem so skinny that you can see ribs... but it's skinny enough to where instead of it's back line being centered over most of it's body, it's leaned over to the side as there's lack of much holding it up. and you can even see in some areas where the skin is skirting out some on the ground slightly. really hard to explain I guess.
