It's been my experience that unless the crop is impacted with grass, the problem is not with the crop, but something in the abdominal cavity. Things like cancer, bacterial infection, worms, and salpingitis can obstruct the intestines, which will cause the crop to appear impacted. You could try...
@CPBlaire, just wanted to say that you shouldn't feel bad about what happened because you're right, most of the posts and blogs don't mention that the two need to be sutured separately.
Source: http://veterinarycalendar.dvm360.com/avian-gi-and-reproductive-surgery-proceedings-0?id=&pageID=1&sk=&date=
Ingluviotomy and Crop Surgery
The ingluvies (crop) is a storage organ that is often full and protruding making it susceptible to trauma. It may also be the site where a foreign...
I think if I were going to do it I would open it back up and either glue the crop of use sewing thread. I would be tempted to leave the skin open to check for draining from the crop incision.
Don't think drainage tube will help because what's in the subcutaneous space is almost certainly the...