Here's how I grade them.
Adult Brood Pairs - Adult birds that meet the standard and when paired will produce sound stock. A high percentage of offspring from this pair will meet the standard, the breeder can expect a percentage will be of show quality.
Young Brood Pairs - Young birds that meet the standard and that, in the breeder's experience, will make a good pair but they are unproven. They are newly paired.
Select Brood Cocks - This is a cock that meets the standard, is show quality, and either has or should produce offspring that stand a good chance of being the same.
Select Brood Hens - This is a hen that meets the standard, is show quality, and either has or should produce offspring that stand a good chance of being the same
Stags & Pullets - Birds that have not made it to breeding age, unproven, no way to tell what they might produce when paired. Take a chance & hope for a good result.
The thing you really have to watch out for when buying gamefowl are breeders who are selling off their culls. When buying young stags & pullets you are buying birds that have gone through the "chick" culling stage, but have not been culled as unshowable or non-brood stock because they have not reached the age for those stages of culling, so you really are taking a chance with them. You might end up with a cull, then again you might get a show winner that makes a great breeder.
Culls that I don't kill I give away to 4H kids, I won't sell them.
