Chickens are NOT stupid. They just learn things and don't like change. I had to retrain my layers this winter (INSIDE A STALL, AGAIN< AAARRGGGHHH!!!! Next year there WILL be a coop!!) to lay in the old dog igloo, where the eggs won't freeze and crack. They wanted to lay in a corner behind the brooder, so I had to lay down some 2 x 4 pieces to nip it in the bud.
Children just like or are afraid of dogs. My dog, "Rose," likes to lick the face of our neighbor's baby son when he is captive and strapped in his stroller. He scrunches his face, but I think he kinda likes it. In a few years, however there MAY be payback!
I don't ever tell them what my dog chooses to eat outside...