I believe it is... but I can't guarantee that it's the same. I want to say a lot of the content from previous versions of poser is carried over to newer versions. Even though some of it is old, it provides a lot of ready to use content. In the 2014 ed, there's a library sub folder that says Poser originals where the horse is located.

The dust settled, thinking "what a fine home, at least for now" not realizing that doom would soon be coming in the form of a vacuum cleaner.