White Park are considered a "Minor Breed" here in the US. If the mamas are black and the babies. Are White Parks, I would hazard a guess that the babies were frozen embryos that were purchased (possibly from overseas - it's easier to import embryos than cows) and implanted into the mamas. And I agree, they are probably angus mommas. When I farmed we used to purchase Simmental embryos and kept some Angus heifers specifically for implanting.~Jan
