My birds never leave my property except one time a year and that is when I put them in the fair. I don't buy random birds from any street corner peddler, All my birds are NPIP certified and I only buy eggs and birds from other NPIP certified flocks, and when they are brought on my property I will quarantine them for 30 days to insure they are clean and they will be checked and Treated for lice and mites even if they don't have them.