A co-worker who also raises chickens feeds her chickens pig feed. She said that it is so much cheaper and she just can't afford the $15 per 50lb bag charged by the elevator or from TSC or elsewhere. She says she feels it is more nutritional. Is this wise or safe? Personally I would love to use organic feed, but I just can't afford it. I would love to find a sound nutritional food for my chickens since I figure I will benefit too eating the eggs they produce.