Farmers are a funny lot…
Buttercup and Daisy were chatting as they chewed the cud.
“‘Ere, have you heard about this mad-cow disease?”
“Yes, sounds nasty.”
“I’m glad I’m a chicken.”
Or…
Two cows in a field. One says to the other,
“What do you think about this mad cow disease?”
The other replies,
“Crikey, a talking cow!”