Day 20 no sign :(

[chicken95]

You are right! I should wait! I don’t see why they wouldn’t hatch!!! I really hope they doooo!!!

 

[ChickenCanoe]

There are a dozen reasons why an embryo makes it to term yet doesn't hatch. But there isn't anything you can really do at this point if they don't make it out on their own..

 

[chicken95]

Oh okay yeah that’s a weird one! I really hope that they do make it out! I should worry at day 23 and maybe check??

 

[MGG]

Oh okay yeah that’s a weird one! I really hope that they do make it out! I should worry at day 23 and maybe check??

They'll be fine. Yeah, if none of the rest have hatched by day 23 then you can candle.

 

[ChickenCanoe]

Oh okay yeah that’s a weird one! I really hope that they do make it out! I should worry at day 23 and maybe check??

Yeah, if the others are hatching on time but others do nothing by day 23, they are the same age, from the same source, you can be pretty sure the others are done. You can do an eggtopsy then.

 

[ChickenCanoe]

Oh okay yeah that’s a weird one! I really hope that they do make it out! I should worry at day 23 and maybe check??

Not weird when one considers all the possible reasons for full term embryos that don't hatch.

1. Improper incubator:
temperature,
humidity,
turning,
ventilation.
2. Improper hatcher temperature, humidity, ventilation.
3. Contamination, especially from molds (aspergillis, etc.).
4. Fumigation too severe or too prolonged.
5. Eggs chilled in transfer, or transferred too late.
6. Broken shell -- pre-set, during incubation, or at transfer.
7. Breeder nutritional deficiencies --:
vitamin D,
vitamin A,
folic acid,
pantothenic acid,
riboflavin,
vitamin E,
selenium,
vitamin K,
biotin,
thiamin,
vitamin B12,
calcium,
phosphorus,
manganese,
linoleic acid.
8. Embryonic malposition; embryo fails to move into proper hatching position
9. Embryological development accident. Failure to change to lung respiration and all intra-embryonic circulation, and/or to retract the intestinal loops and yolk sac. These and other changes are critical at this time.
10. Heredity -- lethal genes, chromosome abnormalities.
11. Twinning.
12. Hatcher opened too much during pipping and hatching.
13. Poor shell quality.
14. Breeder diseases.

I bet you hadn't considered all those possibilities. And none of those things can be corrected on day 23.
I start enhancing breeder nutrition 2 weeks before collecting eggs for hatching.

 

[MGG]

Not weird when one considers all the possible reasons for full term embryos that don't hatch.

1. Improper incubator:
temperature,
humidity,
turning,
ventilation.
2. Improper hatcher temperature, humidity, ventilation.
3. Contamination, especially from molds (aspergillis, etc.).
4. Fumigation too severe or too prolonged.
5. Eggs chilled in transfer, or transferred too late.
6. Broken shell -- pre-set, during incubation, or at transfer.
7. Breeder nutritional deficiencies --:
vitamin D,
vitamin A,
folic acid,
pantothenic acid,
riboflavin,
vitamin E,
selenium,
vitamin K,
biotin,
thiamin,
vitamin B12,
calcium,
phosphorus,
manganese,
linoleic acid.
8. Embryonic malposition; embryo fails to move into proper hatching position
9. Embryological development accident. Failure to change to lung respiration and all intra-embryonic circulation, and/or to retract the intestinal loops and yolk sac. These and other changes are critical at this time.
10. Heredity -- lethal genes, chromosome abnormalities.
11. Twinning.
12. Hatcher opened too much during pipping and hatching.
13. Poor shell quality.
14. Breeder diseases.

I bet you hadn't considered all those possibilities.

What an informative list! Thank you
I will bookmark this and use it for reference often. Thank you again!

 

[ChickenCanoe]

What an informative list! Thank you
I will bookmark this and use it for reference often. Thank you again!

You're welcome.
Better yet get the whole hatchability problem analysis from U of Fla.
https://ufdc.ufl.edu/IR00004437/00001

 

[MGG]

You're welcome.
Better yet get the whole hatchability problem analysis from U of Fla.
https://ufdc.ufl.edu/IR00004437/00001

Woah.... Thanks!

 

[chicken95]

Thank you! I’ve got 3 out of 7 now! The others aren’t pipping yet but it’s mid way though day 22 so I’m gonna hang on a bit more they should be hatching around now-ish if they were healthy right ?