When you buy chickens specifically to breed from, the birds are only half the purchase. The other half is the written record that tells you what they actually are. A serious breeder should be able to hand over, for every bird, something tying that individual to a hatch, a parent pen and a health history. Without that paper trail you are guessing at parentage, and every mating you plan afterwards is built on a guess.
Identity and origin records for each bird
Ask for each bird to be identified individually, usually by the number on its leg band or wing band, alongside the breeder's name and contact details, the breed and variety, and the hatch the bird came from. Young birds should arrive with their hatch timing and the pen they were reared in; adult birds should carry their age and the flock they were bred in. If the flock is recorded with a breed society or kept under a recognised flock name, ask for copies of that paperwork too, plus a sale receipt describing each bird. Match the band numbers to the birds on arrival day, while identities are still easy to confirm.
Breeding history: parentage and performance
The most valuable papers are the ones about the parents. Ask which pen or pairing produced each bird, and whether the breeder runs single-sire pens or a mixed flock, because that decides whether parentage is certain or only approximate. Request whatever laying and fertility notes exist for the parent stock: how the hens laid through the season, how fertility and hatchability ran from their eggs, and any faults the breeder has been selecting against, such as poor shell quality. Show records, where the line has them, add evidence of type, but the performance notes matter more for the breeding decisions ahead of you.
Health history in writing
Ask for the flock's health history on paper rather than as a verbal assurance over the gate. You want to know whether the chicks were vaccinated at hatch and against what, what worming routine the adult flock follows, and whether the parent flock has had illness, parasite problems or unexplained deaths in the past season. If the breeder holds any flock health-testing certification, ask to see it. Also ask whether the flock is closed or whether outside birds have been brought in recently, and from where, since new arrivals are the usual route by which disease enters a yard. These details shape how you quarantine the new birds at home.
If the paperwork is thin
Young birds sometimes travel light, and a small-scale keeper may have honest stock but informal records. In that case, ask the breeder to write down what they do know — parent pen, hatch timing, feed and any treatments given — and sign and date it at the point of sale. Start your own record from day one, so every future mating, hatch and result can be traced by you even if the earlier history stays partly blank. Thin paperwork is a reason to pay a backyard price rather than a breeding-stock price, and to breed cautiously in the first season. Whatever form the records arrive in, KinsLe's Transferrable Profiles keep the parentage notes, hatch history and health paperwork attached to each bird's profile when a keeper takes over, so the story behind your breeding lines is never lost.