Starfire and OrumPoultry are correct about the differences between hatchery/breeders. For people that just want backyard laying hens/pets, hatchery/feed store chickens are usually fine. Most people can't tell the difference between a hatchery bird and a standard bred bird from a reputable breeder unless the birds are side by side and then they can see some of the differences. But most people only see the color of the feathers until their eye gets trained to all the other characteristics of the breed.
I know people that only want chickens for backyard pets and eggs, but because they feel strongly about where they get birds from, they will pay the extra money that it usually costs to get chickens from a breeder. Others just want something that is easily replaced if they were to die - and they are happy with hatchery/feed store/backyard breeder chickens. I have some friends that breed "pretty chickens", but they don't breed to the SOP, but they still have a lot of people that want their pretty colored chickens.
It really depends on what you're looking for, what your goals are for your flock. So far, I've only sold chickens that did not make the cut for my breeding program, but the buyer was looking for "nice looking birds" and so it didn't matter that the birds weren't "show quality". Having decent looking Javas was what she wanted, she wasn't planning on breeding or showing, so it was a win-win for both of us.
And that is another thing - even if a person buys from someone that breeds "show birds" - that does NOT mean the chickens you buy are "show quality". For one, if there isn't a lot of competition in a show, a poor specimen can still win first place. And you cannot buy hatching eggs, chicks, or juveniles and have them "show quality" chickens. Chicken genetics is complicated and in order to buy show quality birds, the birds have to be pretty much mature - which is usually at least a year old - to see how everything comes together and how closely they match the ideal bird described in the Standard of Perfection (SOP). When you buy anything but a mature bird - you may or may not end up with show quality specimens by the time they are grown. They may be pretty colored, but there is a difference between a pretty chicken, and a chicken that meets most of the criteria for the SOP for their breed.
If you decide what your goals are for your flock, that will help you decide where you will want to go for obtaining your chickens.
I am learning about the breeds I like, I want to focus on rare breeds. I do have some strictly for production, but am fascinated by the showing and breeding aspect of it. We used to breed and show AKC Shelties with some top stock from very reputable Sheltie folks and we loved it.
