I got 4 crested duck hatching eggs to see the progress with my 9yr old step-daughter. After doing a lot of research we candled the eggs after several days and could see heart beats in 2 of the eggs. After more candling we realised 1 was not fertile and when we cracked it open we were right- just yoke, another 1 also had a blood ring and was not developing. 2 eggs seemed to be doing ok until day 17 when I realised 1 of the eggs had not moved for a couple of days- we broke the egg open and it had died- I have attached a pic .... Now on day 18 the other egg has stopped moving and I think it may be dead. I candled on day 15 and the duck was v energetic - now nothing :-( I have to say this has been a disappointing experience and just wondering what we did wrong?!!