Candling: Only upper part of the egg has vessels. Temperature too low?

[Berryworm]

Hi,

in a self-built still air incubator, the eggs at day 9 only have blood vessels on the upper part (they are of course turned 3times/day.
Is the temperature too low? Or is it normal that the egg develops only in one part of the egg first?

The thermometer may be a bit off, no way to check precisely.

 

[JaeG]

You can calibrate your thermometer by comparing it to a medical thermometer. Make sure you rearrange the eggs periodically as this evens out any temperature differences because there will be warmer and colder spots.

This is a good candling article to compare your eggs to.
https://www.backyardchickens.com/articles/development-of-a-chicken-embryo-day-by-day.72537/

This is also a good site to follow along with.
https://www.raising-happy-chickens.com/incubation-day-9.html

 

[Berryworm]

Thanks for the reply JaeG
No medical thermometer here, that's why I can't compare.
The ideal would be a thermal camera, would also be interesting to see the temperature diffusion.

 

[Shezadandy]

Hi,

in a self-built still air incubator, the eggs at day 9 only have blood vessels on the upper part (they are of course turned 3times/day.
Is the temperature too low? Or is it normal that the egg develops only in one part of the egg first?

The thermometer may be a bit off, no way to check precisely.

Here is my favorite egg development video that has the distinct advantage of … no shell! It's not the quicker Japanese class one, this is far more in depth. If you're not interested in all the set-up and so on, just fast forward to 4:40

 

[CaradineCousins]

no video

 

[Kiki]

Hi,

in a self-built still air incubator, the eggs at day 9 only have blood vessels on the upper part (they are of course turned 3times/day.
Is the temperature too low? Or is it normal that the egg develops only in one part of the egg first?

The thermometer may be a bit off, no way to check precisely.

Could be normal...the chick doesn't take up the whole egg at 9 days...which means that there are not going to be veins all over the whole egg at 9 days.


Can you get a few clear pictures of the eggs while candling them in a dark room?

 

[Berryworm]

Thanks for the replies.
Now the whole egg is used, although I may have a temperature problem (thermostat and thermometer readings different, don't have anything more precise... let's hope it works out.

Edit: Couldn't get pictures