I have two wolves of the same sex that I think would make good breeding partners if I use a sex-swap scroll. But there is no way for me to tell if they would before I spend a lot of MS for the scroll, and apply it. If they don't make nice children, then I've wasted a lot of MS that are not easy to come by.
If we could preview the offspring of any two (unrelated) wolves, regardless of sex, this would be an easier decision.
Ath
