Chin not active tonight

I got Zoey out just like normal. She came out, jumped around like normal, jumped up on my shoulder and I fed her a oat like normal. She then went into her cage and stayed in the corner for a good 30 minutes. She let me pet her, which she normally doesn't. She did jump around and back but isn't as active as normal. Something is up. I'm feeding her Timothy hay and oxbow food, nothing changed. She did drink water last night. Should I just monitor her over night, if she's not changed by in the morning then take to vet?

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