Death of 2 Edwards embryos

[Edwiges]

I was candling my pheasant eggs at day 23 and I noticed that my two edwards embryos died while all other embryos look fine. What could have caused it?

 

[Stipenvlerk]

I'm not an expert on peasants at all.. But early dead sometimes just happens.
Vitamin deficiency in parent birds,
Genetic defect
Development disorder
etc. etc.
Maybe an incubation expert will have more answers for you