The Chickens and the Worms

The saying goes, "The early bird catches the worm."  Well, with our chickens it is the "quickest bird who gets the worm!" 
The chickens have learned to be ready to snatch a worm when I check the tomato plants.  I have gotten several off the plants and then give them to the chickens.  It becomes a matter of who can grab it first and then run off to enjoy the "treat alone" or would it be more appropriate to say , "enjoy the treat selfishly."