So when you consult with a veterinarian, make sure to ask this key question about your bird's particular diagnosis. Your vet will be able to tell you when the communicable period is over, and when it's safe to re-introduce a bird who has been ill back to your flock.

Of course, just because your bird is not going to pass illness around doesn't mean you should introduce right away. If your bird doesn't have anything communicable but is still weak--or wounded!--do wait until your bird is well enough to hold his/her own with the rest of your flock. With wounds, you generally want to wait until it is mostly healed up, so the spot doesn't present a target for pecking, which could re-open it.