In my opinion, there are three types of quality in the chicken world.
1. Hatchery. By far the worst, when it comes to standards. Though many hatcheries offer good pet-quality (synonymous with hatchery-quality) birds that lay well, they are usually quite off on the standards. They may not even be purebred. Hatchery birds may also have health problems because of disease outbreaks, or because the parent stock has been vaccinated (vaccinating birds will lead to weaker second-generation birds, and breeding for hardiness--even at the expense of losing some birds--is always better in the long run). There are a very small amount of hatcheries that do pretty well, when it comes to standards, but there are not many.
2. Exhibition. To-the-t with standards. Perfect in looks. However, it's important to distinguish
perfect in looks from
perfect in purpose or
perfect in hardiness. An exhibition bird may be flawless in appearance, matching every breed standard beautifully, but it may not whether disease well at all, and it may be weakened through inbreeding. It may also not fulfill its original purpose as a breed. For instance, if a breed was created for egg-laying purposes, it should be a good egg-layer. Should it look like the breed? Of course, but it should fulfill its purpose as a breed before it meets every outward standard for a breed.
3. Breeder. From only the most dedicated chicken-breeders. These birds are not exhibition, but not hatchery. They have enough of the standards (looks, behavior, weight) to be their particular breed, but are not so perfect that they no longer serve their intended purpose. It must be understood that not everyone who calls himself a "breeder" is truly dedicated to a breed. One who is truly dedicated to a breed of chicken--and thereby a true breeder--will be concerned enough about looks to make sure his birds
are pure and
look pure, but will also be concerned enough about purpose to make sure his birds are good layers if they're supposed to be layers and good meat birds if they're supposed to be meat birds.
These opinions are the result of experienced breeders here on BYC giving me advice, so not all of these ideas are "original"
~Gresh~