I have the chance to buy a 3- 4 month Beilfelder Roo for $10.
I currently only have black Astrolaurps and buff Orpington hens.
Will the Bielefelder really increase productivity and make larger eggs in future generations?
What color will the eggs be?
As far as increasing production goes, I've no idea. Perhaps others on this thread with more experience can provide a better answer. I do know that Australorps are already known for being amazing egg layers. Biel eggs are brownish in color, though the hatching eggs I received range from a peachy-brown to an almost mauve color to a deeper salmon-brown.
Perhaps the most desirable thing about Bielefelder roosters is the fact that they're so incredibly people-friendly while be tolerant of other roosters, and yet still protective of their girls. And they're big! Really, really big!