The above video is a Day 7 candling we did a few years ago during one of our hatches. If you watch closely, you will see the shadow of the embryo dancing around in there!
On Day 7:
- The beginnings of feathers are forming on the tail & thigh areas
- Further development of the eye: the sclera forms
- Leg starts to bend at the knee
And that is the end of the first week of incubation... two more to go! The changes really begin to accelerate from here. That embryo has a lot of growing to do before it hatches in 14 days.