Quote:
You should quarantine any new bird for at least a month, regardless of how old or where it came from. Sometimes it takes a while for respiratory problems to manifest.
And sometimes, no matter how long the quarantine, if the bird is not stressed (maybe his new environment is much better than the last one), their carrier status will not manifest itself till much later. So, quarantine, while very necessary, is not perfect. I quarantined the only two birds I ever brought in here for over five weeks.