My ball python has been eating regularly, but still appears underweight?

[theoremofgoats]

Undernourished BP's have a very distinctive look. The spine starts to show, and the body gets a steepled look to it. If you can't see how undernourished the snake is in a photo, then it is probably not undernourished.

Is your snake's dorsum well rounded?
Can you see the spine?
Is it just loose skin that is worrying you?
Is the snake's belly pink at all?
Are the snake's eyes cloudy at all?
Are the snake's colors dull?
Does the snake have a clean fresh water source?
Does your snake have a high humidity hide?

David

You can see the spine just the slightest bit, but it was much worse when I got her. Definitely not steepled though. The skin is pretty loose, though, I can kind of bunch it up-nothing I've seen in either of my corn snakes or my king snake. Belly is cream colored as usual, eyes are not cloudy, and color is just a little dull. I change the water once a day and I only put moss in the hide when the snakes are going into shed.

I also just tried to feed her-she took the mouse, but didn't eat it. Now she's slithering to the other side of the cage. Could she possibly be in the early stages of shedding...? My other snakes get all clouded first, and then stop eating...