Hello,
I'm new and don't tie flies but I do raise Silver Pencil Plymouth Rock chickens that have gorgeous feathers.
I always have cull cockerals for sale and can ship them if anyone is interested in growing them up for the feathers. We don't let them get too old here and thus the feathers aren't long enough before they go into the freezer.
Here's a picture of the adult males around 6 months of age.
cockerals about 6 months old:
http://i935.photobucket.com/albums/ad198/HorseFeathersFarm/659b9a74.jpg
saddle feathers from 1 year old roo:
http://i935.photobucket.com/albums/ad198/HorseFeathersFarm/rubiandchickens033.jpg
hackle feathers from a year old rooster: (same roo as above)
http://i935.photobucket.com/albums/ad198/HorseFeathersFarm/rubiandchickens036.jpg