Found my 2 yr old EE hunched over today. 
She was more hunched in posture when I saw her initially. She straightened up a bit when she saw me.
She has had mild symptoms (dull comb, poopy butt, a bit lethargic) for a couple months. She had a breast blister last fall which got taken care of, and the whole flock was treated for scaly leg mites (side question: how long for new leg scales to grow in? I treated everyone with ivermectin last fall, so it's been a few months, so I'm not sure if I used the wrong dose or if I just haven't waited long enough for new scales to grow back in). I thought her comb was dull because she stopped laying for the fall, but all of the other hens' combs have pinked up since the weather has turned warmer but hers still hasn't.
She's also underweight and the area around her vent feels like it's full of fluid, like a water balloon, but a little harder. I didn't distinctly feel an egg when I checked her over today.
I have no idea if she's currently laying or when she last laid an egg. She's now separated into a large dog crate.
She ate eagerly yesterday when I fed everyone but didn't go for the food I put in her cage just now. Her diet is layer pellets.
I'm going to go to town and pick up some calcium for her. Is there something else I should get?

She was more hunched in posture when I saw her initially. She straightened up a bit when she saw me.
She has had mild symptoms (dull comb, poopy butt, a bit lethargic) for a couple months. She had a breast blister last fall which got taken care of, and the whole flock was treated for scaly leg mites (side question: how long for new leg scales to grow in? I treated everyone with ivermectin last fall, so it's been a few months, so I'm not sure if I used the wrong dose or if I just haven't waited long enough for new scales to grow back in). I thought her comb was dull because she stopped laying for the fall, but all of the other hens' combs have pinked up since the weather has turned warmer but hers still hasn't.

She's also underweight and the area around her vent feels like it's full of fluid, like a water balloon, but a little harder. I didn't distinctly feel an egg when I checked her over today.
I have no idea if she's currently laying or when she last laid an egg. She's now separated into a large dog crate.
She ate eagerly yesterday when I fed everyone but didn't go for the food I put in her cage just now. Her diet is layer pellets.
I'm going to go to town and pick up some calcium for her. Is there something else I should get?