Thanks, guys. The bird appears to be doing better, but I was surprised to learn that the primary cause of impacted crop was grass. Knock on wood, I've never had it happen either, although about half of my birds are on grass (I move my grow out pens frequently). Unfortunately, if it is grass, most of the time surgery is the only fix.
John, just curious, do you still offer grit using sand in your pens? With our sandy soil I never thought I needed to, and so far so good.