Hens are usually associated with nurturing, domestication, or femininity in general (chick!).
Blue Chicken - Is there REALLY such a thing? - Pampered Chicken
Pam's Backyard Chickens: Chicken Breeds Made in America
Backyard Chickens - Everything You Need to Know
blue hen chicken pictures - Google Search
Breed Profile: Delaware Chicken - Backyard Poultry
AN239/AN239: Raising Backyard Chickens for Eggs
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Meet the Delaware Chicken: Backyard Breed Guide