I just picked up a new CD by Don Edwards - a cowboy singer from Texas. It's called "Last Of The Troubadours". It contains version of the song called "The Rancher Feeds Us All". I havn't had a chance to compare the lyrics side by side but my memory tells me there were very few changes made to "westernize" this song. He lists the author as Trad.
This is a great CD by the way. If you've even thought you might be interested in cowboy music this would be a great place to start. Thirty two songs - twenty of them trad. On four of the songs he's assisted by Norman and Nancy Blake. The rest of them are just Don and his guitar. Highly recommended.