Actually Zarago, Feral Heart was MADE on the basis of realisim, so different models for males and females isn't that big of a stretch, nor is the age thing. In the beginning, Kov wanted lions and wolves. realistic animals for his realistic game. That's stated somewhere, though I can't find the source as I'm currently on a restricted access being at school and all.
As for what Saylee said, Feral Heart was made on opinion. The opinion of Kov who had at first wanted it to be realistic. But with the opinions of all the players stressing otherwise, it has become..Well, not.
I think this should be posted in the opinions and ideas section too, instead of just game discussion, but I don't think it'll be moved since it's still game related.
I hope you get your computer to run Feral Heart soon, Saylee~