punky,
I've had at least one article in every issue of Backyard Poultry since they began anew in 2006.
Actually, I think the words 'heirloom' and 'heritage' have been thrown around so much as to be basically meaningless.
I prefer more exact language; such as Ancient, Modern, etc. I think the country of origin is important mind you; however, when speaking of heritage fowl, just for example, why wouldn't the Spanish White Face rank among the highest American Heritage breeds since the Spanish brought them to our shores long before any of the one's we now call American breeds? (They also brought with them the Spanish Game).
Or, how long does a fowl have to be in American hands to be considered ours too? The Asil, which is the oldest documented breed in the world, has been in America for nearly 200 years now. Sure, I know where it originated and I think our Standard is quite accurate (though the India breeders prefer white legs), but how long must it be here before it is one of our heritage breeds? Or what about the Ga Don and Ga Cua which are held by Vietnamese Americans. The Ga Cua is extremely rare in America and in Vietnam. Even though these two breeds are relatively new imports to our shores they are nonetheless 'heritage.'
Thus, more exact language is called for in my opinion. I did write about this a couple of years ago in BP.