What causes chicks to drown in shell?

Hyroler

Songster
Aug 1, 2017
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I had 2 chicks drown in shell while hatching.They were perfectly fine when I went to sleep last night.They both had broken thru and had shell about 1/4 unzipped.When I checked this morning both were dead and shells full of liquid.They were early hatchers it was day 19.Had 2 hatch on day 18 successfully.
 

Hyroler

Songster
Aug 1, 2017
501
1,018
146
Humidity was high around 75 %due to its been raining last few days .I'm at sea level only about 1/2 mile from Ocean .My incubators stay at about 45 % humidity without adding water.If I set small sponge it jumps to 60% which is good.I noticed it was high with sponge and wet weather but didn't think it would hurt.
 

aart

Chicken Juggler!
Premium Feather Member
8 Years
Nov 27, 2012
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SW Michigan
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I had 2 chicks drown in shell while hatching.They were perfectly fine when I went to sleep last night.They both had broken thru and had shell about 1/4 unzipped.When I checked this morning both were dead and shells full of liquid.They were early hatchers it was day 19.Had 2 hatch on day 18 successfully.
How were your air cell sizes?
 

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