"Wrinkle Bum"

[Tim Horton]

As of late one or more, not on the same day so far, of our mottle looking Asa Brown chickens has been laying a soft or thin and wrinkled shell egg.  

Not sure if it is a combination of short day light, feed, molting or what. I'm told they will go through cycles of some sort.  I do have to get the timer light going to maintain near 12 hours light a day.   Also think it may help to get a bag of oyster shell.  But what do I know.  

[mzgarden]

Our girls appear to go through this as well. We generally have free choice oyster shell down for them all year. We find mostly we get thin shelled eggs when the weather is great and they spend all of their time foraging instead of hunkering down in the barn eating layer feed. We get what we call 'jelly eggs' occasionally, sometimes we get really thin shelled eggs and lately we've gotten hard shelled eggs that have a wrinkle 'saved' into them. Crazy things happen with chickens.

[Use Less]

I used to feed eggshells back to my chickens, besides keeping oyster shell available. I crushed them all up thinking to keep the birds from pecking eggs, but who knows if they'd have thought of that. Chickens' brains aren't all so big. There may be less insects around for them to eat as the seasons change, another source of egg-making material.