Duck egg sac yellow

[aliberty]

Hi Everyone, I am new at incubating. We saved eggs from an abandoned nest next to our house. We are at day 30/32 and 3 of the ducks have popped into their air sac, two are not moving last I checked and one is moving around but a yellow liquid has moved into the surrounding edges of the air sac. Is this normal? I have followed instructions so carefully. Not sure what is going on. The 4th one had that yellow liquid seep into air sac as well and did not make it. These are Muscovy.

 

[nuthatched]

How high is your incubator humidity? They egg may have spoiled but sometime if the humidity is too high, water can gather in the air cell.