I have other NN mixes this hatch, but she's the only NN/Biel. Right now I have a broody hen sitting on a few Bielefelder eggs that I'm hoping may give me another NN/Biel mix, but I won't find out for weeks yet.
NNs are a pretty awesome breed, especially if you live in hotter climates and if you want a good meat bird that matures to a normal processing age vs the Cornish Cross. They have fantastic personalities, are actually very good layers, and with 50% fewer feathers, process out much more quickly than full feathered birds. I wanted to cross my NNs with my Biels for the purpose of not only enhancing my meat bird program, but primarily to increase the heat tolerance and hardiness of the Bielefelders.