Cowboy Klaus is annoyed: Lisa and Rosi cook celery mash every day. Cowboy Klaus doesn't like celery at all. Then the smoke signals from the Blue Mountains come just in time: Please-Right-Friendly sends an invitation. Finally, Cowboy Klaus can visit his milk brother and even stay overnight. And if he's lucky, he will experience a prairie dog Pau-Wau for the first time. What an adventure! Will he still get homesick? By the way: 'Pau-Wau' is derived from 'Pow-Wow', which refers to a gathering of Native Americans who come together to talk, sing, and dance.