Jackie, I guess the hunting horn has evolved! The one illustrated in your link looks more complicated than I had expected, more like a French horn. Then I checked out one of the ads below the string, and they showed more expensive versions of the lightweight and not very melodious horn I use in Christmas and New Year's decorations, a simple
belled-at-the-end loop with a mouthpiece.
Wow! I have a decoration that is a replica of an instrument with a name that sounds like a recipe!