I haven't dealt with auburns but I know that you can have a sex linked effect between bronze and auburn. I'm not sure if you use an auburn tom on a bronze hen or a bronze tom on an auburn hen. I can see how this may be used easily with a BBB and an auburn. I do have to say that Broad breasted types in my opinion have the taste bred out of them. It is something that I can pick up on quite easily as do many. I guess my heart in the matter is preservation and improvement. Are turkeys expensive to feed? Yes. Especially with the rising cost of corn and no you wouldn't ever get out of a heritage bird what you've invested in it if you sold off your adults for $20-$30 each. This is why if I cant get a good price on selling my adults, they get butchered, smoked, vacuum sealed and put in the freezer. I might as well eat what I've put into them. This is a hobby for me and I sell my eggs to people who are interested in improving their Lilac or Regal Red Turkeys.