Really porous eggs - anyone know what causes them?

[gritsar]

In candling eggs (from both my broody - her first batch, not current one - and in the bator), I have encountered a few really porous eggs, similiar to what's shown in silkiechicken's pics here:

https://www.backyardchickens.com/forum/viewtopic.php?id=261876

Anyone know what causes eggs to be really porous and thus, not hatchable?

 

[HelenaJean]

i think it's pretty closely related to calcium in the diet. though, i do have an elderly white hen who still lays, but they're usually shelless, porous, have a stretchmark around the middle of half of it has a shel to soin that touching it cracks it. She has the same diet as my other girls, so i assume it can also be related to age.
I don't definitively know, all i really can say for sure is they're not much fun to get

 

[gritsar]

Quote:
Thanks. My girls do have oyster shell in their coop, in addition to the calcium in the layer feed. They are not quite 3 years old, so I dunno.

 

[HelenaJean]

that's about how old my poor laying hen is, poor old thing just can't get it right! lol, the eggs are fine to eat, just not for babies which is sad

 

[gritsar]

Thanks for your reply.

 

[ranchhand]

It's from being stared at too much. Honest to goodness, it is.

 

[debilorrah]

Quote:

99.9% of my eggs have nice hard, firm shells. I have one white leghorn that lays VERY pourous eggs. They are not delicate so to speak, but you can feel how pourous they are in your hands.

 

[gryeyes]

It's so odd, because you can't tell the eggs are porous until you candle 'em. Look perfectly fine in normal light.

 

[debilorrah]

Quote:
Gosh not mine. This one hens eggs feel like they have been rolled in sand. Candling them is something to see.

 

[gritsar]

Quote:
Yeah that. Not all the brahmas eggs, just some of em.
Linda, stand by for an urgent PM.