Well, there's another new series I've seen on Animal Planet. It's called Prehistoric Park, with Nigel Marvin as the host. What it basically revolves around is him running a wildlife park, filled with both modern animals, and extinct species that he's gone back in time to capture. Every episode shows not only him catching new animals, but also real problems that would happen with the animals in the park, such as trying to breed Sabertooth tigers, introducing a Mammoth into an Elephant herd, and many other things.
I think it's pretty entertaining, and it takes a lot into consideration with how modern and extinct animals would get along. If you get Animal Planet, you should definately check it out.
I watched some episodes, I believe in the episode that I got into he went back for a prehistoric croc, huge thing I don't want to ever see in the present time. I wont say to much about it so I wont spoil it for the others that didn't watch that episode.