I know nothing about the Niederrhiener's as I have never had those. I did have one of my Bielefelder hen's trying to go broody on me about a month ago, but I broke her of it. I caught her at the beginning so she wasn't as stubborn yet.I would like to give hatching a try eventually but I have too much going with establishing my tree farm on ATM . I need to purchase an incubator first, but ideally I would let a broody hatch. I don’t know that Bielefelders or Niederrhieners go broody, so having an incubator backup is important.
Next year I will get more into crossing Bielefelder with Niederrhieners.