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Do Hens Know If Eggs Are Fertilized? Avian Instincts and Biology Explained in 2026

"The question of whether a hen knows if her eggs are fertilized sits at the intersection of avian ethology, evolutionary biology, and practical poultry husbandry. As backyard chicken keeping continues its massive upward trajectory through 2026, modern keepers frequently wonder about the internal cognitive and sensory experiences of their flock. Understanding how hens perceive their clutches requires examining both the physiological drivers of maternal behavior and the sensory limitations of avian species. The Evolutionary Mechanics of Avian Reproduction To understand whether a hen recognizes fertilization, one must first look at how avian repr..."

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