Actually, Poser comes with several animal figures and poses in Legacy Content. It also includes the relatively new Hivewire Horse and Gorilla.

My other suggestion to you is to make sure you look into the scripts that come with Poser. I've had Poser for over 20 years, so I've gotten rather set in my ways. Still, many of the scripts that come included are extremely useful. Be sure to look under the Scripts Menu.