Tissue development starts on, Day 1, Day 4, Day 7, Day 9, Limb development (wings and leg buds) begins on, Day 1, Day 4, Day 7, Day 9, The egg tooth begins to develop on, Day 1, Day 4, Day 7, Day 9, The mouth opens on, Day 1, Day 4, Day 7, Day 9, Scales form on feet and legs on, Day 12, Day 16, Day 19, Day 21, Feathers cover the body on, Day 12, Day 16, Day 19, Day 21, The yolk sac draws into the abdomen on, Day 12, Day 16, Day 19, Day 21, Hatching begins on, Day 12, Day 16, Day 19, Day 21

Chicken Embryo Development

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