Just to clarify, NPIP was started in order to protect the food supply, not to certify backyard flocks as healthy, which it does not. It does not test for the most common poultry diseases like mycoplasmosis unless you pay extra and test much more often than once a year. Not even hatcheries are usually certified MG free. So, just don't make it something that it isn't. I see all the time that it's mentioned here on BYC as meaning someone's flock is completely healthy if they are NPIP and nothing could be further from the truth. It is usually required for mailing hatching eggs and/or live birds into another state, plus some states want an additional permit as well.