Does anyone use pine pellets as substrate for their coop? Similar to Equine Pine or Feline Pine, is what I'm considering. It's cheaper than shavings, and I like how easy it is to clean. I've used it for horses and cats before, and would love to just be able to buy huge bags for multi-animal use. Is this safe/advisable? Is there a reason not to use this instead of pine shavings in a brooder, once the chicks are a week old or so and their legs are a bit developed? Thanks in advance!