Is it normal for my bunny to eat his own poop?

And I don't mean his " night time " cecotrope poop, I mean his normal pellet poop. He is fed well with a healthy diet and is always cared for and happy doing binkies and whatnot. But I just saw him eat his pellet poop after he did some on the floor while roaming.
Update: Also I have cleaned up and always clean up immediately, it was just one I missed :D
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