One hen laying egg with balloon like shell

[AGCB]

I have 1 out of 8 hens which for some time has layed a egg that breaks into the nest.
She looks mostly healthy, tail up, nice comb. She does have a lack of feathers on neck front and forward of vent. Vent is dirty. Although this has been happening for a while, I have just discovered who is the culpret.
Looking for best advice to treat or deal with problem.
Thanks
Aaron

 

[Dottie the Chicken]

Do you have calcium shells available for them?

 

[AGCB]

Yes there is always calcium on the side.

I just bathed her. cleaned out vent area. Put her in the broody cage with food and water (with ACV and save-a chick electrolyte).

Checked bath water for worms. The only thing I see that could possibly be a worm is this. 6mm long. Thanks
Aaron

 

[Dottie the Chicken]

@Wyorp Rock @Eggcessive @aart

 

[aart]

(with ACV and save-a chick electrolyte).

DO NOT mix these. EL in one waterer and plain water in another.

The only thing I see that could possibly be a worm is this. 6mm long. Thanks

I would cut that open to see more.

Soft shelled eggs are usually because of lack of calcium or a dysfunctional reproductive system. They can also happen with a young new layer and in older birds before and after molting time.
How old is this bird?
What all and how exactly are you feeding?

And last but not least....
Where in this world are you located?
Climate, and time of year, is almost always a factor.
Please add your general geographical location to your profile.
It's easy to do, and then it's always there!

 

[AGCB]

2-1/2 years old. 5 from same batch. 2 older hens