Niederrheiners, available as Lemon cuckoo Niederrhieners, is a dual purpose, cold hardy docile breed. Auto sexing but difficult to distinguish until a week or so old. They grow much MUCH faster than Bielefelders throughout the first year, and pullets come into lay about 2-4 weeks earlier. I harvested a couple of cockerels at 14 wks last Fall and the dressed wt was 4.25-4.5 lbs. (would liked to have gone to 16-18 wks). Right now I have a 10 month and two 8 month old pullets. Their eggs are 55-70g consistently and they lay in winter. Pullets presently weigh 7-9 lbs. They need lots of fluffy-butt trimming as they are messy.
Mine are from McMuurrays. I will say they are way too fragile as chicks; my losses exceeded 50% on my first order and 25% my second order.
I will eventually hatch eggs from BM (Big Momma, 1st pic) and my Bielefelder roo, Spatch. 2nd pic below is of the LCN cockerels at 14 wks- Frodo and Sam.