Not pooping?

[mygabriella]

Maybe I'm just over reacting.
My savannah is just over 2 feet long. She hasn't pooped in a little over a week. Usually she goes every 2 days. I've been giving her crayfish which is different and freshwater bait fish. Her last poop was poop mixed with crayfish shell.
She has a borrow, 70% humidity, big tub of clean water, basking temp is 148 right now. She's still active and wants to eat all the time. She's looking a little round, not bloated but round. Any ideas? Is this normal?