Ok, time for an update. That might have been the longest piece of tough weed that I've ever seen. I wasn't able to remove all of it.
It's very hard to describe what exactly was in there.
It was a very tough/dried piece of grass/weed. It was like a long skinny piece that every so often branched off ~ sort of had these tough clumps.
He's the cutest little bantam cochin, and he seems to be doing ok.
I know a lot of it is still in his crop. Do you think I should do anything else?