Ceder fiber, You don't replace it you just add to it. If you stay on top of it, you can keep it clean. We fluff it once a week and add a bedding powder that eliminates the ammonia. We can tie three calves, and started with a dozen bags, we add a bag per calf every week or so.
We do clean the entire beeding out at the end of each show season, and start fresh each year.