I haven't read this whole thread just some here and there. I did notice a few pages back some concern about what constituted a heritage large fowl. The American Livestock Breeds Conservancy (ALBC) has a Heritage Chicken Definition that I like (and I apologize if this has been pointed out somewhere previously, but worth reiterating here), briefly:
Heritage Chicken must adhere to the following:
(1) APA Standard Breed: must be from a parent and grandparent stock of breeds recognized by the APA prior to the mid-20th century (so a breed in the SOP prior to 1950) whose genetic line can be traced back multiple generations and with traits that meet the APA's SOP for the breed -- produced and sired by an APA Standard breed.
(2) Naturally mating: reproduced and genetically maintained through natural mating.
(3) Long productive outdoor lifespan: must have the genetic ability to live a long, vigorous life and thrive in the rigors of pasture-based, outdoor production systems. Breeding hens should be productive for 5-7 years and roosters for 3-5 years.
(4) Slow growth rate: . . . must have a moderate to slow rate of growth, reaching appropriate market weight for the breed in no less than 16 weeks.
Terms like "heirloom," "antique," "old-fashioned" and "old timey" IMPLY "heritage" and are understood to be synonymous with the above definition.
Good thread.
Christopher McCary