I noticed my female rabbit eating a hard poop pellet that she accidentally kicked out from the extra litter box I keep around my apartment. I do not observe this action with the hard poop pellets scattered around in her xpen. I feed her 1/4 cup Timothy pellets, 2 cups of veggies, and unlimited Timothy hay. I’ve observed her do this three times in the past two days. Is this something I should be worried about? Do your rabbits do this?