Chickens fly to avoid predators. They also go airborne when chasing preys.
In cockfighting, high-flying game fowls usually have the advantage as it could spare them from the sharp knives of their opponent.
But as roosters are not capable of flying as high as other birds, practicing them to fly higher would be good for upcoming fights.
The video below shows how you could train your game fowl to fly higher.
Watch the video here: