I've been using TerrAmigo bedding along with straw in the coop for as long as I've had my chicks (about 15 weeks). I changed it up and used pine shavings instead of straw today, and they refused to go back into the coop tonight. I finally got them in, and they won't go near the pine shavings in the nesting boxes. Will they adjust or do I need to go back to straw? They genuinely seem upset about it.