We recently just moved our 9 week old chickens in the coop outside the house. We have old dried hay bales so we decided to use it as their bedding. I recently found out today that hay bales are actually bad for chickens because of mold and bacteria. So my question is, is it really that bad even though the hay bales are dry? If so, can you guys recommend a cheap alternative. we have a decent size coup so if we buy something from the store it has to be a lot.