REW x REW = 100% REWs.
It would depend on what the black doe carries, but I think you would get either some REWs, or none at all.
I'm not sure if NZ's mask anything being as how REW used to be their standard colour. If they came from a line with blacks in it, though, then they could mask black, and could produce blacks when bred to a black doe.
Emily
NZ's carry lots of fun colors.... If you breed a White to a red you'll blacks, blues, and steels.
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