You aren't asking this question to feed into a school project are you?  The way you posed it, it seems too generic...as if you have no awareness of anything related to feeding the livestock species that would be getting this ration change.

If I misjudged, I'm sorry, so please ask again with more specifics and fewer theoreticals. In other words, be honest and you'll find help here....but if there's a funny smell to your question you may get blasted.