Todays crackers.... from my TA xmas lunch

Why did the cow wear a bell?
Because her horns did not work.

Why do cows lie down inthe rain?
To keep each udder dry.

Where do snowmen go to dance?
To a Snowball.

What do you call a train loaded with toffee?
A chew-chew train.

What do you call a horse in his pyjamas?
A Zebra.

What do hedgehogs have for lunch?
rickled Onions.