Egg production issues like this are genetic, usually seen in high production breeds like sex links.Thanks a million. I feed Dumor Chick Starter (24%), then Dumor Layer with sides of oyster shells as they get older. No double or triple yolks yet so I'll keep feeding, waiting and setting - who knows what will happen with my little backyard brood...
Not to be a spoil sport, but it’s really not something you want in your birds. It’s not worth the strain it puts on their system and the health issues it can cause with egg binding and whatnot.
It’s a funny little glitch, though! Just not something I would want to see regularly, for the sake of the chicken.

Seriously, I prefer big eggs for cooking with, but my hens' health comes first. For now I keep the Jersey Giant's and BC Marans' eggs, which average 60-70 grams, and give away the rest. Can't seem to give them fast enough, and one of my Brahmas just started laying yesterday, bringing my layer count to 6 (out of 14). It's a nice problem to have, really.


