A heritage chicken is one that in superlative degree of comparison –
(1) Must be reproduced and genetically maintained through natural mating and is the result of naturally mating pairs of both grandparent and parent stock;
(2) Grows at a rate of moderate to slow development, reaching market weight in no less than 16 weeks, during which time it develops a strong skeletal structure and healthy organs; and
(3) Possesses the genetic ability to live a long, vigorous life and thrive in the rigors of pasture-based, outdoor production systems.