I agree.I think everyone is worrying unnecessarily about testing and the possibility of buying a sick bird. If a bird looks sick don't buy it. Then when you do bring new birds in don't introduce them into your flock until after a minimum of a two weeks. I don't have my birds tested and don't intend to. No testing will take the place of practicing good bio-security.
I personally would never spend money at a vet training to save a bird that can be replaced for $3.
