Hello! I have searched the threads and found a lot BUT theyre all several years old. So I wanted to see if I summarized the information correctly before I take my "next steps". HISTORY: Henrietta, a red sex link, is a retired organic layer. She is approximately 3-4 years old, but could be older, and 5 pounds of curiosity and mischief. She lays HUGE eggs, pretty regularly. About a month ago the girls came down with what (after copious research) I believe was Infectious Bronchitis. I treated with Tylan as recommended to ward off other infections and VetRx to help with comfort. All have recovered nicely EXCEPT that Henrietta is prone to soft-shells and shell-less eggs now. I understand that IB can mess with the reproductive cycle so I'm not sure if this condition was caused by the IB or by age or something else. TREATMENT A: I first began by upping her calcium intake... she didn't eat oyster shell (none of them did), so I started by adding it to their feed bowl to 'trick' them into eating it. It worked, and now they'll peck at it free-will. This has not been enough, however. So I then gave her a single injection of Calcium Gluconate solution followed by about .75CC in a "treat" every day at bedtime. Improvement, but not complete improvement. I started backing off, just to see what happens, and that's when the shells disappeared completely. Yesterday, after a oral treatment for the previous 2 days, she was back to an extremely soft shell, but at least it had a shell. TREATMENT B (FUTURE TREATMENT(S)) What was recommended was the following: - Add D3 to the mix (absorption may be an issue) - More sunshine (We have a "window" that replaces one of the doors in the coop. I use it in the winter to help heat the coop with sunlight; their run is pretty shaded in the winter, unfortunately. I started taking the window off because the temps have risen BUT perhapsIi should not do that just yet...) - ACV in the water (I've been adding the calcium glutonate, but maybe the others don't really need that) - higher calcium feed... WHERE TO GET THIS? Our feed stores (I've been to all 4) don't offer a high-calcium option - our feed is 4.3% and I don't even know if that's considered high/medium/low. Maybe online? Thanks in advance for any feedback!