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Air sack still Alive?

post #1 of 4
Thread Starter 
If their is an air sack on the egg does it mean the chick is still alive? I have had some problems with temp and humidity so just wondering? Will there be veins if the chick is dead?
Edited by LaurynRose - 5/17/16 at 3:32am
post #2 of 4

Air sacks grow in any egg- fertile or not, incubating or not. It's the result of moisture loss. When you hard boil a months old refrigerated egg and peel that flat area on fat end is where the air cell was.

 

If a chick dies the veins start to disintegrate. Day 10 and on it's hard to see veins as there is a growing mass (bird). 

 

When candling check your humidity by the size of air cell and day of incubation. This model below is meant as a reference not exacting but if cells are much smaller than model take water out and dry incubate to catch them up. If too large add more water. Remember, the air cell is result of moisture loss in egg so changing the humidity increases or retards it's rate of loss.

 

Z

Are you using a still air or incubator with fan? Where you measure and at what temp your adjusting to is different for them. 99.5 F for forced air and 101.5 F for still air measured at top level of eggs if upright in turner, 100.5 F if laying on side.

Everybody talks about the weather, but nobody does anything about it.

 

-Charles Dudley Warner

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Everybody talks about the weather, but nobody does anything about it.

 

-Charles Dudley Warner

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post #3 of 4
Thread Starter 
Quote:
Originally Posted by Egghead_Jr View Post

Air sacks grow in any egg- fertile or not, incubating or not. It's the result of moisture loss. When you hard boil a months old refrigerated egg and peel that flat area on fat end is where the air cell was.

If a chick dies the veins start to disintegrate. Day 10 and on it's hard to see veins as there is a growing mass (bird). 

When candling check your humidity by the size of air cell and day of incubation. This model below is meant as a reference not exacting but if cells are much smaller than model take water out and dry incubate to catch them up. If too large add more water. Remember, the air cell is result of moisture loss in egg so changing the humidity increases or retards it's rate of loss.

Z

Are you using a still air or incubator with fan? Where you measure and at what temp your adjusting to is different for them. 99.5 F for forced air and 101.5 F for still air measured at top level of eggs if upright in turner, 100.5 F if laying on side.
I am using still air so yesterday there was a big issue and I I am worried for my chicks. In the morning I wake up and my bulb has went out. Not sure what time. So then it is 82 degrees and 85% humidity. It must not have been out Long because it wasn't super cold. So then I put in a new light but I only have a 40 W so I go to school and for about I would say probably four hours I wasn't there and the temp was 110 when I got home just trying to see if there still life right now. My mom said it was only there for like an hour but I don't know. Hoping the thermometer was wrong. How can I tell if they are still alive have regular temp,about 100 with still air incubation.
post #4 of 4

Keep in mind that air temp is not the internal temp of the egg. IF it was a short time and eggs did not have time to get up that high they are fine. Forget the terminal temp, if the internal temp of egg is bit over 102F or maybe 103 F  then the embryo cooked. Again, it takes time for the egg to get up to same temp as the air. 

 

And remember that the air temperature is layered. In still air incubators this is dramatic and why you measure at top level of eggs 102 F. The bottom level of egg will be much colder and the internal temp of egg will be 99.5 F. So you see, you've a lot of variables going on there. Where are you measuring temp, is the thermometer accurate, how long was the temp that high and did it result in the internal temp of egg getting to near 103 F? No idea. Wait a day and candle at night, sometimes when candling you'll see movement inside. Also as stated the veins if still visible will indicate it's still alive. Or candle and wait few days and candle again. Did they grow? If so then still alive. 

Everybody talks about the weather, but nobody does anything about it.

 

-Charles Dudley Warner

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Everybody talks about the weather, but nobody does anything about it.

 

-Charles Dudley Warner

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