I have my little ones on Carefresh bedding, and I think I've used way more bedding than necessary for just 2 chickies. There's no smell and the bedding looks clean and I've been adding more here and there to make what my kids call a "chick mountain" so they can sleep closer to the light if they want. Do you have to change their bedding entirely once a week? When I had them on paper towels I could tell I'd have to change them every day or so, but it seems like I could just mix up the bedding I'm using and maybe sprinkle more on top and it would be fine. It seems silly to throw away so much bedding when it only got used by 2 chicks. Anyone else just stirring and adding?