I'm interested in this one as well. I can get a large roll of hay for $35, a brick of shavings is $5-$6. I'm guessing that a roll would last me 1.5 to 2 years, if I didn't feed the rest to the cows maybe longer. I'm guessing I'll go through a brick of shavings every month or two. So that is $60-$120 a year under ideal contions. Now I've read that hay can harbor mites, and that could be a problem. I do plan on using DE (bought full bag yesterday), so I don't know if that would negate the mite issue? Any other reason NOT to use hay? I own a chipper, and could send the hay through that first? That might knock the volume of hay way down, so I might only get a year out of a roll, but still much better than shavings. I'm still really new to all of this, am I missing something? Maybe a combo of shavings and hay?