O is doing fine. I think he coughed up that last spine (if it was indeed still in his throat, anyway). He's kind of sulking now, but that is his normal behavior. His mouth is closed to a normal level and gills are no longer flared.
I think he'll be alright. I just hope he doesn't try to eat the other one. My roommate is going to leave it in there, I guess (his only other tank has two 5" albino Os in it, so...). We'll see if Os really are smart enough to learn from past mistakes, I guess.