Mouth opening appears. Day 10 Beak starts to harden. Skin pores visible to naked eye. Digits completely separated. Day 12 Toes fully formed.
First feathers appear.
Day 13 Scales and claws appear. Body fairly well covered with feathers. Day 14 Embryo turns its head towards blunt end of egg. 15 Small intestines taken into body. Day 16 Scales, claws and beak becoming firm and horny.