I've noticed a lot of my girls will sort of move their mouth and their head vibrates a little. That sounds really weird, but it's actually quite cute if you see it for yourself. They only do it if they are really comfortable or happy it seems like. Like when they are being groomed, or falling sleep somewhere comfy. Olive, one of the show mice, did it a ton when I first brought her home. Olive also sparks constantly, she's always sparking around the tank. She's such a happy mouse. I'm wondering if maybe it's bruxing? I've seen a few videos of mice bruxing and it seems to be the behavior they are showing
Sound exactly like bruxing to me, you have some very happy and content mice! My rat girls used to brux all the time and it made me so happy to hear. Bruxing is just like when a cat purrs, happy and content
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Bumping up an old topic, because I finally got a video of it! Cotton was happy tonight, snuggling with her sisters, and she starting doing it!
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