I would say 1-2 months. I always quarantine my chickens for 2 just to be extra careful but I’m not that certain on pigeons. I would assume the same time?
Always keep new fowl quarantined! You never know what they could have or could be carrying! Also I believe there was a saying that for each roo there was supposed to be 7 hens? If that’s true you might want to separate the roos or get some more hens. If they get all hen aggressive it could lead...