A funny thing I read on another post today -- one Breda breeder had a bout of hot weather and their hatch produced an inordinate batch of cockerels and no pullets. Apparently, cooler weather hatches more females. Something to think about in the Nied hatches!
So glad GFF got back to you! They have been instrumental in bringing the rare European and world's rare breeds to the USA. Not cheap for them to do it and hats tipped to them for doing the imports. Because GFF deals in small numbers of a particular imported rare breed those will most likely be the only genetic pool available in the USA. Dealing with a very small number of birds within a breed will not likely increase genetic hardiness. It's too bad because large numbers produce healthier resistance in breeds. But it is VERY expensive to import birds with all the fees and restrictions on livestock imports so it's not feasible to import 100's of chickens just to increase hardiness in one breed. That would be great if GFF can get their Nieds to hatching well again! They spend so much money importing lovely birds that I'm always rooting for them! I remember they imported Ausburgers a few years ago and one USA breeder bought out GFF's entire Ausburger stock. Now I don't see the breeder offering the Ausburgers any more and hope they didn't phase them out since they were the only known Aus's in the USA that I was aware of! Aus's are a lovely jet black chicken where some of them produce Buttercup combs. The problem with Aus's is that only about 25% of the offspring will sport the Buttercup combs so maybe the breeder got tired of trying to perfect the combs? That's a lot of chicks to hatch and feed to only get 25% with the desired buttercup trait.
I am in contact with a KS breeder who is increasing the hardiness resistance in Breda by infusing another breed of similar chicken by cross-breeding to increase hardiness. Then crossing the offspring back to the original rare Breda to get body type, color, temperament back into the original standard of perfection. A time-consuming project! Otherwise the same genes bred over and over again will make a breed weak, die, and of no use to anyone. But without new Breda poultry being imported the USA Breda breeders have to do something within the USA to increase disease resistance and hardiness. Hence, they use a similar breed to cross with the Breda and then cross back until they get all the good Breda traits back again and hopefully with better health issues. I hope GFF gets some hatched cockerels to add to the USA Nied diversity!