If I'm not wrong, this is the one where you get an ibex, a hippopotamus, a beaver and a cheetah and then you have to breed four of every animal and give them up for adoption...right?
I've tried this one, and for some reason I get no guests at all. The zoo is open, I even set ticketing price to "free" and no guests come. I've managed to breed two of every animal already but as you can imagine I'm running really low on cash.
Edit:
Sorry, I believe the scenario in this thread is the one that comes AFTER the one I mentioned above. I'm kind of stuck on this one now, I don't like the terrain, very difficult to work with!