I didn't forget about these guys, I've just been sick the past couple of days...
These are kind of rough, but they'll give you something to play with.
Nifs and the max file are
here. Theres no sounds as of yet, and there are a few problems... I made it a little big, so I have it fscaled at 0.16 here... you might want to go a little smaller. Also, the slide attack looks more like a bellyflop... I'll work on that, and do up some more attacks, and I can do more skins as well. I'm stuck with the resource penguins until I learn more about how resources work.
I too think these would be best as barbarian units, but what you do with them is up to you.
Dom Pedro, what animals did you want? I can add a few things to my to do list. I might not be able to get to them right away, but I could alway take a look.