I'm so glad my half-thought-out rambles at work have brought at least some more deserved attention to the sheep. The mouflons are lovely, but more biodiversity is always a win for VS.
Fun fact! Mouflon were the first sheep species domesticated by humans. You can look at surviving cuniform texts from Mesopotamia (~3k BC?) where they specifically mention bringing in mouflons (tišānum) caught in the mountains to breed with their existing stock of sheep. It seems to be for genetic diversity primarily, and to strengthen various "wild" traits. Hybrid sheep breeds were only ever with Mouflon (or mountain?) sheep, not cross-breeding domestic lines. Sometime about wild and fierce natures, iirc? Makes sense that Mouflons in VS are just as spicy!
It was always male Mouflon bred to tamed ewes, too, which reminds me of the domestication mechanics in VS being linked to the mother's gen. I think it would be a fun project to bring in a "new" Mouflon ram every few generations to breed with the current flock.