Why is it that pigs always bow their heads when they walked?

Question

Why is it that pigs always bow their heads when they walked?

Answer 1

To see where they are going?

So they don't make a pork of themselves.

Answer 2

they are smelling the world around them

Answer 3

They're just hamming it up!

Answer 4

They bow to their superiors called humans, who make a bigger pig of themselves sometimes

Answer 5

maybe they have tunnel vision?