Well, I do agree with you that it would be fun to have that more realistic aspect in gameplay, such as prey (which, as it's been said before, has been a very thoroughly discussed topic in the past), and having pups would be fun.
Sadly, though, thar be two problems with these;
1.) With 'real' offspring, I'm assuming you're talking about having NPC (non-playable characters) that act on their own, just part of the game as they run around with your characters. I imagine the necessity of this would be questioned, though, since that would be prone to glitches (in reference to the many WolfQuest pup issues), and it's far easier to find another roleplayer to customize a pup/cub that looks like its parents and play along with you guys.
2.) This ties into both prey and the offspring idea; The plain and simple fact being that we can't have any major game updates like that until Kov comes back to us. He's been out for a while, and until he returns there won't be any prey updates (as there have been murmurings that he was going to add them into the game), etc., in the foreseeable future.
I do appreciate you sharing your ideas with us, though. Be sure to check out the Game Disccussion and other idea threads to see who else shares your thoughts and ideas. It might be worthwhile. c: