My Ideal chicks are thriving. I also think that if you posed the exact same question to all hatcheries their legal response would be identical or similar to Ideals. Be realistic like one post said. Can any hatchery be 100% certain they are clean. I appreciate Ideals honesty and I got excellent birds we are enjoying. I will make a point to order all of my chickens from them next year meat and hens because in case anyone has noticed the number of hatcheries declines yearly it is not growing and we need diversity.