Did I kill my chick ?

[TheOddOneOut]

I saw blood in the egg once the chick broke the shell
I had never seen blood like this when the other chicks broke the shell, and they hatched
that's my question : where did this blood come from ?

Do you mean the chick was bleeding?

 

[Quailophilic]

Do you have any pictures???

 

[Quailophilic]

Do you mean the chick was bleeding?

Possibly the chick may have ruptured its own vein... And then bled to death

 

[Quailophilic]

I saw blood in the egg once the chick broke the shell
I had never seen blood like this when the other chicks broke the shell, and they hatched
that's my question : where did this blood come from ?

Did other chicks hatch perfectly?
Is so then maybe this chick had some genetic problem. IMO

 

[MGG]

I would respectfully disagree that you should "never help a chick hatch", I have saved many chicks that would have otherwise succumb without aid. However, I fully agree that you should wait until there is not other choice.

That said, based on your findings- I don't believe you killed the chick. Minor cuts to the shell should not cause any issues so long as the humidity is right or close, especially a day after it pipped. Something wasn't right if there was no yolk absorption at the point it died.

Did you have other chicks in this clutch that hatched, or was this the only egg? If you had others that hatched correctly, then you already have your answer.

They pip and then absorb the rest of the yolk before finishing. Same with veins. They pip and then absorb the rest of their veins

I agree, I've helped a number of chicks. When incubating in an artificial setting any problems are usually either our or the incubator's fault. The chicks shouldn't have to suffer for an error on our part. If I know a chick needs assisting I will always assist it. I think OP's chick was maybe ima cool spot or something. I had cool spots in my old incubator and I had similar problems. Overdue, unabsorbed, quitters. Once I got a new incubator that problem stopped.