Just brilliant. These are some of my favourite lines:
Karen Pryor: by associating R+ with road crossing and P+ with standing still, with a VR schedule, and offering a reward in keeping with the Premack principle, we increased the intensity and frequency of the road crossing behavior.
Electric Collar Advocate: whenever the chicken does not cross the road I give it an electric shock. But do not worry, the shock is no more than you would feel if you walked on a carpet wearing socks and it does not bother the chicken at all. The feathers standing up and the smell of burning flesh mean nothing. In fact, they are happier having nice clear communication than they would be otherwise.
PETA member: chickens have the right to live in world without roads. Any chicken that lives within a hundred miles of a road is suffering an inhumane existence and might eventually be hit by a car so we should kill it today to ensure that it does not die tomorrow.
But really you have to read the whole thing.