.. apart from the obvious, and whilst many would say "who cares", there are an equal many who will be quite concerned.
especially, so when the chicken it's quite likely a phoenix chook, a breed of long-tailed chickens, with awesome snow white plumage, and a bright maroon comb!
then again, if you are into jokes ... here goes
Answer: He had something to cock-a-doodle dooo!
or if you are into the 'other' science...
Albert Einstein: The chicken did not cross the road. The road passed beneath the chicken.
Isaac Newton: Chickens at rest tend to stay at rest. Chickens in motion tend to cross roads.
Wolfgang Pauli: There was already a chicken on this side of the road.
Carl Sagan: There are billions and billions of such chickens, crossing roads just like this one, all across the universe.