I've dealt with impacted crops twice. First time, it was my rooster. I noticed he wasn't eating or pooping. When he did poop, his droppings were so teensy, it was like they were from a baby chick instead of a 12-pound Brahma. I felt his crop, and it was small and rock hard. I squirted olive oil down his throat and massaged his crop. He was better the next day and eating again and pooping normally.
The most recent was a few weeks ago, when I noticed my one-year old SS hen standing in a corner not moving. I examined her and saw her crop was the size of a soft ball and rock hard, and it hung off to one side. I got some olive oil in a syringe and squirted maybe 1/4 cup down her throat, massaged her crop for fifteen minutes, feeling it soften and break up. Inside of an hour, she was good as new, eating normally and it hasn't happened again.
I didn't feed either patient anything special afterward. But I believe the thing that caused the hen's impacted crop was getting some turkey dressing leftovers. She was a bit of a glutton. I am not feeding them any thing made with bread from now on, except for maybe scant bits of crust.
