Cause of chick loss between day 7 and 14?

[Shemira]

Hey lovely chicken folks

Quick incubation question
- 1st candling at day 7; 18/20 developing eggs (shipped eggs)
- 2nd candling at day 14; 4 losses

I've been told (not sure if correct) that it is less common to have losses at that stage. What would be the common causes for this? 3 were actually side by side. Nurture right 360 incubator.

Many thanks in advance for any thoughts

 

[EggSighted4Life]

Quick incubation question
- 1st candling at day 7; 18/20 developing eggs (shipped eggs)
- 2nd candling at day 14; 4 losses

That doesn't sound too bad so far for shipped eggs.

Seems you're pretty curious and into details, so you might enjoy the following link, page 51 shows *possible* causes of dead embryos based on day of incubation/passing..

https://www.hubbardbreeders.com/media/incubation_guideen__053407700_1525_26062017.pdf

Happy hatching!

 

[Shemira]

That doesn't sound too bad so far for shipped eggs.

Seems you're pretty curious and into details, so you might enjoy the following link, page 51 shows *possible* causes of dead embryos based on day of incubation/passing..

https://www.hubbardbreeders.com/media/incubation_guideen__053407700_1525_26062017.pdf

Happy hatching!

Amazing, thankyou

 

[Susan Skylark]

Trauma to the genetic material during early or preincubation is the main cause of mid to late embryonic death or failure to hatch, this can be caused by shipping, heat, cold, or age (over a week old at incubation). 10% loss at each stage (early, late, lockdown) is pretty normal and nothing to worry about. A little higher in traumatized eggs is also ‘normal’ so I wouldn’t worry about it in your shipped eggs. I had up to 50% late embryonic death rate in February eggs vs September or May eggs (cold trauma). I had similar death rates in shipped eggs with saddled air cells (sign of major trauma). Also consider hatch size in any statistical calculation, if you are only hatching 10 and two happen to die it really throws off the statistics but is actually pretty normal to lose a couple, even if it is 20% in this example, just like a 100% hatch rate on four eggs really isn’t that impressive but on a hundred it would be.

 

[Shemira]

Trauma to the genetic material during early or preincubation is the main cause of mid to late embryonic death or failure to hatch, this can be caused by shipping, heat, cold, or age (over a week old at incubation). 10% loss at each stage (early, late, lockdown) is pretty normal and nothing to worry about. A little higher in traumatized eggs is also ‘normal’ so I wouldn’t worry about it in your shipped eggs. I had up to 50% late embryonic death rate in February eggs vs September or May eggs (cold trauma). I had similar death rates in shipped eggs with saddled air cells (sign of major trauma). Also consider hatch size in any statistical calculation, if you are only hatching 10 and two happen to die it really throws off the statistics but is actually pretty normal to lose a couple, even if it is 20% in this example, just like a 100% hatch rate on four eggs really isn’t that impressive but on a hundred it would be.

oh wow, thanks so much for sharing that info. I had assumed the any early damage would just prevented them developing at an earlier stage.