Swine exhibited at the Ohio State Fair and many county fairs will be required to be ractopamine-free in 2020 due to market demands (ractopamine banned in international markets).The Ohio State University Extension, Ohio Department of Agriculture, Ohio Pork Council, and Ohio State Fair have collaborated to put several resources together that can be found at: https://ohiopork.org/ractopamine-free/
You can also find timely information in this article from the Ohio Country Journal.