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Eggs are not hatching

Posted: Sat Oct 01, 2016 10:59 am
by hat.him
My zebra finches laid 4 eggs. It has been somewhere around 15-20 day since they were laid. It is said that they hatch at around 12 days. Any reason? Also, how to check by candling them?

Re: Eggs are not hatching

Posted: Sat Oct 01, 2016 11:56 am
by Sally
Here is an excellent thread on candling, with photos showing what you should see:

http://www.finchforum.com/viewtopic.php?f=5&t=8295

I always wait at least a week (if not more) after the eggs should have hatched before tossing them. I can't always be positive when they started incubating, rather than just going in and out of the nest.

Re: Eggs are not hatching

Posted: Sat Oct 01, 2016 12:49 pm
by hat.him
Sally wrote: Here is an excellent thread on candling, with photos showing what you should see:

http://www.finchforum.com/viewtopic.php?f=5&t=8295

I always wait at least a week (if not more) after the eggs should have hatched before tossing them. I can't always be positive when they started incubating, rather than just going in and out of the nest.
Thank you so much,really appreciate your suggestion =D> :D

Re: Eggs are not hatching

Posted: Sat Oct 01, 2016 3:11 pm
by cindy
you count from the time the hen starts incubation not when the eggs were laid, hens usually start sitting tight around egg 3 or 4

Re: Eggs are not hatching

Posted: Sat Oct 01, 2016 4:06 pm
by hat.him
cindy wrote: you count from the time the hen starts incubation not when the eggs were laid, hens usually start sitting tight around egg 3 or 4
I am aware of that fact. They started incubating after the 4th egg was laid, it has been around 15-20 days. I'm sorry that I didn't mention that up there.

Re: Eggs are not hatching

Posted: Mon Oct 03, 2016 6:23 am
by hat.him
Sally wrote: Here is an excellent thread on candling, with photos showing what you should see:

http://www.finchforum.com/viewtopic.php?f=5&t=8295

I always wait at least a week (if not more) after the eggs should have hatched before tossing them. I can't always be positive when they started incubating, rather than just going in and out of the nest.
I see no veins while candling :( the is only an air sack and some yellow part.

Re: Eggs are not hatching

Posted: Mon Oct 03, 2016 8:52 am
by Sally
I would say then that the eggs are infertile. Infertile eggs will have a large air sack at one end and the yellow yolk that you see. At this point, I would toss them.

Re: Eggs are not hatching

Posted: Mon Oct 03, 2016 11:35 am
by hat.him
Sally wrote: I would say then that the eggs are infertile. Infertile eggs will have a large air sack at one end and the yellow yolk that you see. At this point, I would toss them.
I only managed to check two eggs, and they both had no veins. As I mentioned, there was this yellow stuff in one and the other one had a dark substance, almost brown in color. Is that infertile too? :(

Re: Eggs are not hatching

Posted: Mon Oct 10, 2016 2:48 am
by monotwine
Sometimes a dark egg is one with a chick inside or a dead one.
Only way is to leave the eggs for a little longer and wait till parents abandon the nest. They know best.