I had read they do...perhaps I'm wrong?

Would a dullness be dehydration? She's eaten 3 f/t fuzzies in her almost 4 weeks with us and I've seen her drink once. But, she's only ever gone to the bathroom once - poop, urate and liquid pee.

Her scales aren't wrinkled and her eye caps are smooth.... just not as bright and shiny.
I took the moss out incase it's not shed, as I don't want her getting scale rot. She's not pink either.

Advice? Dehydration? Possible oncoming shed?