Desert Boy had previously drenched his nice sneakers by stepping into a stream (on purpose), so he was riding barefoot. He was eager to get on and listened carefully to Uncle Dave's instructions.
Some of the feed lot pens have cows in them, so Desert Boy got a nice high view of them. Desert Boy can't quite say "Mooo," but he can say "Mmmm." The border collie following Shelley is Heidi, the trusty dog who knows how to move cattle much better than I ever will. (Henry stayed by me--he just goes up to the cows and barks and doesn't know how to do anything more than that.)
Desert Boy seemed right at home on the horse, and didn't want to stop riding. It won't be that long until he can start helping.