In the market or in a backyard or in a farm
Spar, Spar, Spar, Spar, Spar.
Hold, Feel, Smell, Listen, Look.
Ask the breeder-cockfighter if you can see spars of the potential breed. Then zero in to the individual rooster. In 5 spars, a rooster will prove if he is consistent, smart, powerful with endurance and stamina.
Females can be chosen by proxy thru the spars of the males. But can also be sparred if allowed by the owner.
For “check list” of gamecock brood stocks physical and behavioral characteristics
– Gameness til the End