Soft eggs, no shell, or just yolk

[Hebkate]

You may want to give her a 1/2 tablet of human calcium with vitamin D today and for up to 7 days, and then see if she lays any with hard shells. If she continues with soft shells, there may be something wrong with her shel gland in the oviduct.

How should I give my chicken the tablet? Crushed up?

 

[rosemarythyme]

How should I give my chicken the tablet? Crushed up?

You can force open the beak and stuff it inside, whole (they can swallow it quite easily), or crush it and mix it with a very small amount of wet or fermented feed and feed it to the bird in isolation.

 

[Altairsky]

Heat stress can also cause hens to lay shelless eggs. If this is the case, it will fix itself when temperatures gets cooler.
Giving her calcium citrate + D3 tablets/pills helps a lot with the heat stress related shelless eggs issue.