I've been trying to read through the PDF, haven't had much time to but I'll get to it eventually. In the mean time, I did a blog post about training animals a bit ago. I think what I was going for is too complicated for your needs or wants for Dinosaur Cowboys but it may give you a few ideas. 
I like the idea that this can be a GMless game for those quick and fun games.
			
		




 ). Similar to how human cowboys can be Dusters (slower but tougher), Neotechnoists (weaker but better with guns), etc. dinosaurs can choose a "Breed" that can modify some stats. Here are the four I went with:
 ). Similar to how human cowboys can be Dusters (slower but tougher), Neotechnoists (weaker but better with guns), etc. dinosaurs can choose a "Breed" that can modify some stats. Here are the four I went with: