My chickens are pretty smart, and yes, it makes them highly suspicious creatures. I put a whole peach in their run one time, and they were so nervous about it they huddled on the opposite side of the run until they were positive it wasn't going to move. They never ate it either. Ha!
I placed a whole corn cob in the run one day .. you would have thought it was a grenade!

They were, however, quite happy to eat the corn out of my hand after I picked it off the cob!
