Yup lol,mine are also trained to come to "heeeerrrrreee chiiiiick chick chick chick" yelled like your yodelling. My BFF has a pic of me laying face down in the herd, completely covered in chickens cause I put feed on my back and called them XD.
Mine come running everytime I call them with a loud "BOK BOK BOOOOK!!!" The neighbors must think I'm crazy for clucking at 5:30 AM to feed the chickens.