Genetic Hackle, Fly Tie Chickens. Original bloodlines are Beaverkill valley hackleand Toni Marie Astin. At least 3/5 are pure Beaverkill, The remaining birds are from Toni Marie's fly tie hens bred to my best beaverkill cock..Great hatchability, and very good layers. I have invested over $300.00 in hatching eggs and 3 years to this project. Worth the trip to SW South Dakota to get the entire flock.