Worries about mad cow disease

There were these two cows, chatting over the fence between their fields.
The first cow said, “I tell you, this mad-cow-disease is really pretty scary. They say it is spreading fast; I heard it hit some cows down on the Johnson Farm.”
The other cow replies, “I ain’t worried, it don’t affect us ducks.”

Three very tough mice

Three rats are sitting at the bar talking bragging about their bravery and toughness.
The first says, “I’m so tough, once I ate a whole bagful of rat poison!”
The second says, “Well I’m so tough, once I was caught in a rat trap and I bit it apart!”
Then the third rat gets up and says, [...]