Greetings from Kansas, marilyn2, and . Happy you joined us. If the grounds around where they drink or where you fill their waterers is always wet and gets stinky, you can rotate it to drier spots periodically. Another solution is perhaps putting down a layer of sand around the watering area. This will allow for less standing water and hopefully less smell. Here's an article from the Learning Center (brown tab above) that talks about dealing with a muddy run. https://www.backyardchickens.com/a/how-to-fix-a-muddy-run-chicken-coop
Good luck to you and thanks for joining BYC!