Because the farmer had cold hands
Stop fallowing me!
A: Because he can't see through the wall.
The Moo York Times
A cow with a cold.
The cow didn't make it.
High Moon!
Because he was hooked on worms.
Because he higher and higher. (I translated the joke from Dutch, and yeah it's supposed to not make any sense, it just sounds funny, in Dutch at least. :-$)
They have bad mittens.