Just as I suspected, The Three Kings from the Orient have been playing Chicken Toes when we are not looking.
See the Double 9 to your bottom right ? That's where the game begins, and the next game you begin is with the Double 8 and so on and so forth. If you have 2 players, draw 8 Dominoes to begin, and draw from the pile left over when you don't have a play in your possession.
The object is, of course, to play all of your Dominoes, or to at least have a low score of total dots when someone else has played all of theirs. But here's the scoop: See the 9 that was played off of the Double 9, with the 4, and then the Double 4 going sideways ? That Double 4 going sideways is the Chicken Foot. And once someone plays a Chicken Foot, everyone has to play off of it until you have 3 Chicken Toes. Then you can continue to play off any of the Dominoes in the usual way. And the toes can be as long as you want and/or need them to be.
Thanks to my cousin, Roxy Goodman, for giving us yet another way to while away the days of Winter on The Prairie. Oh ... And ... if you have more than two people playing draw 6 Dominoes or so to begin. Be flexible. I mean, after all, it's just Chicken Toes : )