Sorry your girl is unwell. This hen has the stance of one with reproductive problems. Look at her vent, is it pulsating? Is anything oozing out? Gently feel her abdomen. Is it bloated? I would give something stronger for calcium... a calcium citrate plus D3 pill, if you have it. Feel her breast muscle. Is it wasting away and us her keel bone sharp?
If you can answer these questions, it gives a starting place to further help you.
If you can answer these questions, it gives a starting place to further help you.