Bloodline / StrainA selectively bred line of gamefowl with consistent traits (e.g., Kelso, Sweater, Hatch). This is basically what "breed" means in gamefowl.Pure / PuroA bird from a single bloodline with no crosses. "Puro Kelso" = pure Kelso. Highly valued by breeders.Cross / KrusOffspring of two different bloodlines.SireThe father.DamThe mother.LinebreedingMating birds within the same bloodline that are related but not immediate family. Keeps traits consistent.InbreedingMating closely related birds (father-daughter, siblings). Concentrates traits but carries risk of genetic defects.OutcrossingMating two completely unrelated bloodlines. Produces hybrid vigor but less predictable offspring.BackcrossingBreeding a cross back to one of its parent lines. Used to get, say, 75% Sweater / 25% Kelso.Hybrid vigor (Heterosis)The phenomenon where crossbred offspring are often stronger, healthier, and more vigorous than purebreds. Common reason breeders outcross.InfusionIntroducing a small amount of another bloodline into your line. "Asil infusion" means breeding in a small percentage of Asil for gameness.Foundation stockThe original birds used to start a breeding program.Brood yard / Breeding penThe area where breeding pairs are kept.Pairing / PagparesThe act of selecting which rooster and hen to mate together.SelectionThe process of choosing which birds to keep for breeding vs. culling from the program. This is the core skill of a breeder.CullingRemoving birds from the breeding program. Doesn't always mean killing — can mean selling, giving away, or just not breeding from that bird.PrepotentA bird that consistently passes its traits to offspring regardless of what it's paired with. A prepotent broodcock is extremely valuable.Nick / NagnickWhen a specific pairing produces exceptionally good offspring. "That Kelso-Sweater nick really works" = that combination consistently produces winners.BattlecrossA cross specifically designed for fighting, not for further breeding. Meant to be a "terminal cross" — the offspring fight but aren't bred from.