Raisins! They will jump 5 ft in the air and pluck the raisin from between my fingers every time. They then proceed to fight over them... And I tell them to share equally.
Don't give them too many though, it can hurt them!
Oh buttermilk was a hit today!!! They were even peaceful and didn't get the pecking order started. Everyone drank until they were stuffed and no fusses. Wow!