I called the state vet- she gave me the number I needed- then I scheduled the appointment and the person came out and did the testing.Here (SC) it was free-my favorite price!
That is what I did called state vet. Set up app. they came and tested every bird the first time. Then just a few random birds out of each pen ever year after that and any new birds that you get. Don't forget to lock up birds the night before they come. That way you don't have to chase them down because they won't. It can not be below a certain temp. Tester had to do it in the front seat of her truck. Temps dropped the night before she was not happy. She had to leave her truck running the whole time. Good thing we only had to do a sampling that year.