Here recently I've noticed on of my pigeons acting strange and almost falling while flying. Tonight before I shut the barn door I decided to check him out. Once I got to looking at him, I noticed a large hole in his stomach. It starts right below his crop in the breast plate and moves down towards his anus. I think someone shot him. I mean its a huge hole! I put antibiotics on it. Should I pen him up, or let him fly with the other birds. I mean I noticed him acting strange 3 or 4 days ago.