The same as Selecting a Brood Cock article in terms of pedigree performance and vital statistics measurement guide.
Basically, the hen’s ancestors, siblings, and test mating offsprings are all great winners.
Some hens fight each other or young stags. You may be able to see their gameness, intelligence, power, and speed.
The hen’s shank must be at least 3 inches from the top of the prop toe to the middle of the knee. Be patient and eventually you will get your criteria say 3 inches of shank. On some strains 2.75 inches might be the most you can expect.
Make sure the leg is almost 50% longer when compared to the shank length. If not it will be a stork like station and the hen might produced males that over-reach and not on target hitters. And the power blows will be gone.
The body must be slim as to be light weight and not bulky.
These are for non-naked heels particularly steel fighters which are fought between 1.8 kilograms (3.96832 pounds or ~ 4 pounds) and 2.5 kilograms (5.51155 pounds or ~ 5 pounds 8 ounces).