My first thought too was that she is heading into shed. Typically with a shed cycle the get a pink belly, a few days later go blue, a day or so later clear up, then shed a day or a few days after clearing up. It's a process, that takes awhile. And one of mine in particular will be grumpy before I can tell a shed is coming. Her mood usually tips me off first.

Also, did you recently move her to the new rack? She could be stressed too.

Don't be afraid of her. Bites are not that bad. It's more the shock of it, than any sort of pain.

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