Stephen Chang's book "the complete system of chinese self-healing" contains the five animal excercises, though the instructions seem a little vague and I'm not sure if this guy is for real, he seems like he is though.
The way he describes the excercises are actually mainly visualization techniques by the looks of it. They're a bit like playing around pretending to be a specific animal, but I haven't tried them so I couldn't say how effective his explanation of them is.