This was the doctors reply:
Thank you for the picture and additional information. This looks more like an intestinal ulceration condition, although severe coccidiosis can look that way as well. Unless other birds seem to be coming down with this condition, or the already affected ones getting worse, I would recommend sticking with the treatment plan and seeing if you can pull her through this crisis. If you don't mind opening her up and seeing what you find, I can help you interpret your findings, if you'd like.
Best regards, Dr. Bob
I told him I thought we should cull her to find out what is afflicting the flock. Ending her life & doing a necropsy may save the rest of the flock.
About my coop:
Its 8 x10 and actually, the door swelled when it froze, so it doesn't shut all the way, the windows are just slipped in plexi glass (like a picture frame, there is just four wooden toggles that hold it in place.) In October, the first snowfall, we had a good amount of snow inside, so on the outside of the windows, we used the feed grain bags, cut them and stapled them over the windows to keep the snow out. The grain bags are like tyvek -- So, its really not locked up like fort knox.
I did smell ammonia the other day, which is why I cleaned out the entire DL and started over as suggested by another expert forum member, I would have to go back through this post to find out who.
Here is how all my problems started.
Deep Litter since October. Two weeks ago we had a blizzard, almost 4 feet of snow. The girls started staying inside 24/7. Lots of poo, inside the coop. It got to -15 and -26, I, against everything I had read, did the stupid thing and put a heat lamp in the coop. The water fount must not have been even because the ammonia was coming from around the litter by the fountain--
So, deep litter, heat, water. Coccidiosis was given the chance to grow and thrive. Now you're suggesting a respiratory infection...thats probably because of the ammonia when I was cleaning it out.
Everything happened because I heated the coop.