I've been unable to get local testers to come out and test flock - they say they don't have any serum or whatever that is called. I was going to sign up for the class to get certified so I do not have to mess with finding someone who WILL test. Well, in my research, I current tester from another county said as long as my birds come from a place that has had them tested, I do not need to get them tested. Also, I should go ahead and use the NPIP number from where I got them from. Wow! I had no idea. That just saved me so much time and money!