how do i know if my cockatiels have an illness.
my female cockatiel sneezes every once in a while , does she have a sines infection?
when my brids are on a perch , sometimes they pick thier feathers is this a cause of parasites or a diseease or just behavorial?
my birds harly ever screech or tweet is that normal?
I've had my cockatiels ever since 2007 should i contact a veteranarian to check up on them for any one of the infections listed above?