When we lived in Germany, my husband spent a lot of time with the local Jagermeister, (or "hunt master" which we might interpret as forest ranger) who also raised hunting dogs and entered them in competitions. My husband had to learn the German commands for when he showed the dogs. Today, my son is a K-9 officer, and he uses mostly German language to communicate with his shepherds and malinois (the family pets as well as the working dogs).