How do i harden up one of my girls eggs?

[Mamaoflots]

We have 3 chickens, and 2 of them produce nice hard shells, but Caitlin's eggs are often paper thin, cant always pick them up without them squishing in your hand. Sometimes if she has laid before the others and I don't get there quick enough, someone else has sat on it!
How can I harden them up? We feed them Dodson and Horell layers pellets, corn, and various food scraps, fruit and veg. Is there anything else I can try.

We think they got particularly soft after the visit of a fox, which we managed to disturb early on, and so didn't lose any that night.

Thanks

 

[Rubbertoe]

I was told to give ours crushed oyster shells to help thicken egg shells.

 

[Mamaoflots]

They don't eat it! We also feed back their shells, but I don't know if she eats it or not.
Will yogurt help? Just thinking calcium.

 

[Eggcessive]

Greens like kale and collards have a lot of calcium. Honestly, when I take my egg shells out to the coop the girls act like I have scratch, and they will scarf up every piece of egg shell I toss. So maybe just give your one girl the egg shells. Chickens do normally eat the oyster shell as they need it. I keep mine in a coffee can 1/2 full where they help themselves. I always have 1 hen though that still has a soft shell, so she must not eat it or she has a problem absorbing calcium.

 

[casportpony]

I grew a whole bunch of kale and collard greens for my birds this year (mainly for the peafowl), but I also feed them alfalfa hay, which the all love!

-Kathy