I usually hold the eggs and can feel them move. High powered flashlight will cause them to move even if you can't see them moving, you can feel them. 500+ lumens. I used a 600 lumen for chickens, but the darker quail eggs got me and I paid for a 1000 lumen beam of brilliance. I wanted to see!I only had 5. One died yesterday, these two hatched this morning and there are two more that jumped around in a float test. Hopefully they hatch.View attachment 1890530
Here's hoping for the last 2 floaters!