I think it's always good to refer to this chart when planning your livestock. You will also notice that there is some cooperation between the ALBC and the "Slow Food" movement Ark of Taste. They are good resources when deciding what to do.
One thing I have noticed, though, as the really rare breeds seems like you only see them in bantams. Finding the heavy breed equivelant can be tough and can cost you plenty of $$ to get started in (if you can even find them).
One thing I have noticed, though, as the really rare breeds seems like you only see them in bantams. Finding the heavy breed equivelant can be tough and can cost you plenty of $$ to get started in (if you can even find them).