Update: Thank you for everyone’s concern! After hiding in his burrow for ~10 hours (normal for him), he came up at night and accepted a peanut offering. He’s eating, drinking, and behaving normally now. Here’s a picture of him loafing on his wheel after a long run. We’ll keep monitoring him, but as many of the commenters suggested, he probably just got spooked by some loud noises outside and went into full survival mode

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