Wild chickens aren’t much like the ones Col. Sanders raises.
They can fly just fine. It’s like the difference between a dowmestic turkey and a wild one, night and day!
Go to Hawaii, the island is riddled with wild Chickens, the joke is that the Chicken is the state bird.
A wild turkey and a domestic turkey differ primarily in intelligence. Wild Turkeys are smart and cautious. Domesticated turkeys are about as stupid as a really smart Liberal.
But, all else aside, no Chicken - wild or tame - has the body mass to wing ratio for any significant flights. You will never see the Great Chicken Migration of 2009, Chickens are just not built to fly. Far too much mass.