We had a ~ one-year-old hen who developed what seemed to be an impacted crop. It was enlarged, very hard and didn't go down overnight. We tried isolating her, giving ACV in her water and a soft diet. The swelling went down some but didn't go away. We thought we were going to have to cull her but my husband found information on doing surgery to clear the impacted crop. We did that today. When I got in there, the crop was virtually empty and there wasn't a lot of room. We decided culling was our only option. It was apparent she was starving to death and the situation wasn't resolving itself. After butchering, I checked out her crop and other organs to see what I could learn. Her crop is pictured below. The lining/sac was thickened up to an inch in places and there was very little room left inside the crop. Her gizzard had some grit in it and lots of grass. Her left breast (under the crop) was large compared to the right which was almost non-existent (shown in the other picture). This had obviously been going on for a while as there wasn't much left to her. I'm curious if anyone has run into this or has any ideas what might cause this.