Why is there a cow in there?
Because Jesus was born in a barn with all the animals.
But one of the cows might think he was hay. That's the problem when you have cows because they don't know very much.
"In the central portion of the great North American Continent there lies an arid and repulsive desert, which for many a long year served as a barrier against the advance of civilization. From the Sierra Nevada to Nebraska, and from the Yellowstone River in the north to the Colorado upon the south, is a region of desolation and silence." - Sir Arthur Conan Doyle, A Study in Scarlet