My chickens very favorite is grapes, I split them in my hand and try to throw them to them faster than they can pick them up....can't beat them though. They usually take them from my hand.
My chickens love Honey Combs and oatmeal. On a hot day I put out watermelon they can see that really good and come running for it. Every time I put and treats out I call them and they come running. Good luck getting them back.