It is natural for bunnies to chew. A lot. One of the things that is supposed to help correct bad chewing in bunnies is a soft, covered hutch. One site recommended building one out of a cardboard box with lots of fresh hay. I built one for our bunny. So far the only critter who wants anything to do with it is Cali who sits on top and chews the cardboard. Right behavior, wrong pet!
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