I've recently tried to get into animal husbandry, but I've ran into a bit of a wall; I can't for the life of me get a bull! I've gone and trained 6 aurochs already and all I've got is cows.
Now, assuming that the chance to get either gender is approximately equal (50%) The probability of this situation happening to anyone is about 1.5625% (.5 x .5 x .5 x .5 x 5 x .5 = 0.015625)
So I guess I've just been screwed by fate, oh well right? I don't think that this needs to be a part of the game no matter the probability.
My suggestion would be some way to determine the gender of a wild animal before having to commit to train them. There's probably other ways to fix my concern, but this solution made the most sense to me.