Throughout much of time, most dogs, of most breeds, of most ages, in most parts of the world, have chased sticks. Sometimes, the game is referred to as "fetch" and other times it is called "get" or "retrieve the stick". The game is simple. The human tosses the stick and the dog runs off excitedly to get the stick and return it to the awaiting human. Most of us have watched it even if we have not done it.
In our more sophisticated society, dogs (and their human friends), especially those who strive to eat healthier and live more purposeful lives have altered this age-old game. Rather than randomly chase a boring, leafless stick, they are taking kale sticks and purposely, systematically, and methodically, fetching, getting, and retrieving kale sticks. Yes, those tough as nails stems of the fall-friendly kale plants can provide entertainment, nutrition and fun for diverse dogs who in the past would have waited days or even weeks for a boring stick. Now, every night of every day that humans eat kale for dinner can be game night for our dogs!
PS Who would have ever guessed the value of defoliated kale sticks?
PPS I do think there is a marketing possibility in this:)