Talk to the management. I would even call your state veterinarian. Petsmart had only recently started selling birds again. They had stopped because of a bacterial upper respiratory infection. This could be the same thing. Why would they would think that not selling birds for awhile would change things? They are still buying from mills and backyard breeders that are overbreeding, crowding and generally have poor care. The source has not changed. Petstupid ...grumble grumble
The disease they had was psittacosis. It is contagious to humans.
Disease Listing, Psittacosis, Technical Information | CDC Bacterial, Mycotic Diseases
Listing for state veterinarians
State Veterinarian List