I have thought about this before, and never really come to any conclusions. As we know, there are humans bodied beings in this world that are animal spirits - but how can that be? I'm really not sure, but what is important is that these beings keep the belief strong. Now, it depends on what exactly you are wanting to think about the origins of. Some furs are not animal spirits, and are just fans of anthropomorphic art. As you said, Jadnar, these type of creatures date back to Egyptian times, probably before (I'm not too good on history). The difficult thing about this, is that anthropomorphic creatures are not seen around today. I say the same about Dragons - we know they were real, and are still real, but there are no exact Dragons living now, as we know them - only reptiles that are distantly related, and human-bodied beings with their spirits. So because of these example reasons I gave about Dragons, it is hard to be certain of anything on creatures such as anthropomophic beings. To summerise, I am not certain on how it all began, as there are different aspects of it to consider. I like to think of it from a spirit point of view, but that is because of what I am. Though, doing this makes me none the wiser on how animal spirits found their way into human bodies.