On Tuesday, one of my cubalayas was acting strangely. She wasn't eating when everyone else ran for their breakfast. She was walking slowly and had her head sunk down. She is normally very active so I was worried. I separated her from the flock and examined her. She seemed very thin. On Wednesday, she was more lethargic and wasn't eating anything at all. Friday, she died. I did a necropsy and her crop was full of undigested corn and some grass. I examined her intestines and did not find any worms. Liver looked normal color, gizzard was full of rocks but not grain. The exam also confirmed that she was very thin no fat at all. On Friday one of my Polishes was exhibiting the same symptoms. I thought that from what I found on the other hen it might have been impacted crop. So I tried to make her vomit without much success, so I did the surgery. (I have experience with surgery, but it was still very stressful). She perked up after the surgery and I was hopeful that I had solved the problem. I last checked her at 2 am this morning and she was walking around and drinking water with her head up. This morning she was gone. I went out to the coop and my other Polish is doing the same thing!!!! I isolated her in the house as it has been a little chilly. I don't know what to do. I feel like such a failure because they are dying and I don't know why. I called the vet and none of the vets in my area have any experience with birds and none seem to understand why I am upset. I need help. The crop on my chicken feels squishy, the other two had watery diarrhea. If it matters the weather has been unusually wet lately. They are kept in a sheltered area, but no internal house. I feed layer ration and scratch grains. The corn was from some I gave them before I learned it could cause impacted crop. They were all hatched from Ideal Poultry and vaccinated for Marek's. All were hatched in May. No eggs yet.