I have 2 Buff Orpington roosters that are about a year old. I want to keep only 1 of them for breeding. What are the most important characteristics to select for in breeding? These were just hatchery chicks, so I don't have great starting material, but want to improve the next generation if I can. They have been great layers, and have wonderful personalities, but are definitely not up to breed standards.
If they are hatchery birds, it really will not matter. We have a "breeder" here in Arkansas that culled all her hatchery males and acquired some exhibition males to use with her hatchery hens. She has some fairly nice birds now. Each year she has added new males. Your male is 50% of your flock. I would suggest visiting poultry shows in your area this fall and pick up a new male. Many will have some available. We plan on bringing some to Lucasville, Ohio this fall.
As far as what to select for. Always select type over color. Color is important, but you build the barn, then paint it.