Start with age, sex, and laying status
The first questions for a Wyandotte seller pin down exactly what you are buying. Ask each bird's age and sex, and whether hens are point-of-lay pullets, proven layers, or older birds being rotated out of a breeding flock, because those are very different purchases wearing the same feathers. Ask when the hens started laying, how steadily they lay through the week, and whether laying holds up in winter, since Wyandottes are valued partly for continuing to lay in cold months. A seller who answers with specifics per bird, rather than general breed praise, is giving you information you can plan a coop around.
Ask how the flock actually lives
A Wyandotte's future behavior is shaped by the life it has already had, so ask how the flock is kept. Find out whether the birds free-range or live in a run, what they are fed day to day, and how much handling they get, since a hen from a calm, handled flock settles into a backyard routine far faster than one from a hands-off setup. Ask about temperament honestly: Wyandottes are generally confident and can be assertive with quieter breeds, so learn whether these birds live peacefully in a mixed flock or rule it. Ask to see the pen itself; its condition answers questions no seller will volunteer.
Ask the health history of the whole flock
Flock health questions protect every bird you already own. Ask what illnesses or parasite problems the flock has had, how the seller manages prevention, whether the birds were vaccinated against common flock diseases as chicks, and whether any birds have died unexpectedly in the past season. Ask how the seller handles a sick bird and whether new birds are quarantined before joining their flock, because their biosecurity habits become your birds' history. Vague answers here are themselves an answer. A careful breeder tracks flock health and can talk about it in detail without defensiveness.
Test the cold-hardiness claim against their setup
Wyandottes are sold on winter hardiness, thanks to the rose comb that resists frostbite and their dense feathering, so ask how the seller's birds actually come through cold weather. Ask what their coop setup is in winter, whether the birds keep laying and condition through it, and whether they have seen frostbite or cold-related losses in their lines. Also ask which color variety you are looking at and whether the birds are bred toward the breed standard or simply farm-bred, since that affects size, laying, and temperament expectations. Specific winter stories tell you more than the breed brochure does.
Ask what support comes after the sale
Finally, ask what happens after money changes hands. Will the seller take questions in the first weeks, help you confirm a bird's sex as it matures, or take back a bird that turns out to be a rooster where roosters are not allowed? Ask for the bird's feeding routine in writing so you can transition diets gradually rather than switching abruptly on arrival day. Gather every answer, hatch details, feed, health notes, laying history, into one record from the start. If those hens ever move to a new keeper, KinsLe Transferrable Profiles passes the Wyandottes' profile on with that history, diet, and routine intact, so the next owner starts informed rather than guessing.