Thank you!
I kept chickens for about 13 years, and got to try a quite a few different types of bird during that time. I loved doing it, but had to take a 6 year absence from chicken keeping due to life blowing me around a bit. So I'm building my flock from scratch and testing breeds new to me. I may go back to breeds I know, but since I'm starting fresh I may as well take a chance or two on the unknown.
Right now all we have are pet breeds, unintended for the table, with a few very young bresse thrown in. I'm trying to clarify what my family needs and wants out of a duel purpose bird.
I know someone local who breeds American bresse from green fire stock so I'm not worried about trying to find more bresse if I need them. However bresse are flighty and I've heard the roosters can be aggressive. (none of mine are very old) I have young children so an aggressive rooster CANNOT be tolerated. Also pure bresse can have problems with thin shelled eggs and other issues caused by no protective bloom to keep bacteria out of eggs. Unless I luck out with a calm rooster and can figure out the shell issues I don't see myself breeding this bird when I have a source so close.
I would love to keep dorkings, but have heard mixed things about hatchery stock for this breed. If I can find good birds, I would like to keep and breed some of the pure strain, since they are so hard to find. but I would also like to see if breeding to bresse would help offset some of the temperament and shell weaknesses in the bresse. Supposedly the cross results in a flavorful bird that reaches processing size earlier than the dorking but that also stays tender at an older age. All I have to go by is hear say so experimentation is very tempting.
Well, I'm incredibly biased, but I'd like to throw the NN Turken out there for consideration too.
Just a thought...
I've been experimenting with a number of breeds, including Dorking-mixes that were supposed to be pure Dorkings, and I keep coming back to my NNs, which are also very easy to breed to other birds, have exceptionally friendly temperaments, supply good meat at reasonably young ages (14-20 weeks), lay lots of eggs, and with 50% fewer feathers are MUCH easier to pluck. I know many people find them ugly at first sight, but after raising them I guarantee you would come to love the breed. I've actually begun crossing all of my other breeds (Barred Rocks, pure Bielefelders, White Rocks, Australorps....) with my NNs and have seen consistent improvements from each cross, and they're incredibly hardy and healthy birds.

