Feathers of F₁ hen-feathered male before (1), and after (1ª) castration.
Feathers of a darker hen-feathered male before (2), and after (2ª) castration.
PLATE 8
Feathers from hen-feathered male Sebright (1, 2, 3, 4) that changed to cock-feathered male (1ª, 2ª, 3ª, 4ª) after castration; and then began to go back as the testes regenerated (1ᵇ, 2ᵇ, 3ᵇ, 4ᵇ); then changed again to cock-feathering after castration (1ᶜ, 2ᶜ, 3ᶜ, 4ᶜ).
