I usually switch to both the higher protein feeds when it gets icy like this and add a good bit of scratch for heat production. So far that's worked and our fertility hasn't been all that bad. Even out doors, I've had six of eight hatch, and incubated still getting 70/80 %. I've some probably...
I can try a simple explanation and Suze or Chris or Henk can tell you if it works or not.
The three colors BBS, blue black and splash are interbred because they produce reliably within that group. Splash IS a form of Blue. If I breed Blue to Splash, I get about half and half, depending on...
My Sizzle roo is smaller than my Silkie cockeral, and I have several, Sizzled Delawares (and they're huge hens) running around in the brooder pen. So yes, it's quite possible.