My one year old hen stopped laying and only lays yolks…

[madisoncurtis]

I have a white leghorn, 1 year old who started laying at 18 weeks, and then after a few months of laying she stopped before the fall light change. When all my hens started laying again after winter she never started back up.
She stopped laying before fall and then since idk August or so I’ve gotten maybe 6-8 normal eggs from her. But she continues to lay just egg yolks every couple days. I see her going and laying on eggs in nesting box during day and doing call with no eggs.
I’d think calcium or deficiency but all my chickens have access to shells and none of my other chickens have issues laying. Last 4 days she’s been sleeping in the nesting box at night. Just super weird. When vet came he said she was laying in the yard and I was like no I don’t think so and he’s like yeah she is. But I lock her up till 3:30 most days. Then I watched her poop just an egg yolk shortly after. So thought I’d pick your chicken brains

 

[aart]

poop just an egg yolk

This is the pic?
I'd cut that in half lengthwise to see what's what.

 

[madisoncurtis]

This is the pic?
I'd cut that in half lengthwise to see what's what.

Yeah this is pic of what she laid. It’s a chalky coating inside a pure yolk no egg white.

 

[getaclue]

Research this: https://the-chicken-chick.com/salpingitis-lash-eggs-in-backyard/

 

[madisoncurtis]

Yeah it’s not solid though it’s a yolk inside

 

[getaclue]

From the pictures, it appears to be a lash egg. Lash eggs are not always totally solid. Do you offer free-choice oyster shell, or some other form of calcium for your layers? I'd start with that. Sometimes, when they resume laying, they need the extra calcium. There is also something called Egg Drop Syndrome.