I might have posted about this lady before- 2 year old naked neck, started laying shell-less and tiny eggs in the spring, listless at times, but not "sick". She would breath with her mouth open, gaping- I even treated her for gapeworm. Finally took her to a vet, and vet assumed she had a respiratory infection and gave her Clavamox. My hen improved while on the Clavamox, but on the 2nd day off of the meds, she was right back to having listless days, standing with eyes closed at times, and doing the mouth open breathing. I picked her up and out plopped a pinkish hard peanut sized mass, so I gave up and took her to thee Avian vet here in town. Worry about costs later, I guess. Avian vet diagnosed her with a serious infection of the shell gland, and she had a bunch of masses (hardened egg yolks?) inside of her that she removed manually. More antibiotics, but she should improve. Now- I'm supposed to prevent her from laying until next spring, and it's August about now. HOW?? Anyone have experience with this?