I was student of shaolin for a few years in my younger days so i think that the thoughts of humans taking on aspects of other animals has always fascinated me. It seems to me that animals are instinct based never doubting their decisions or hesitating. That is what keeps them content. They are founded on hunting food and raising young. Happiness to me is simplicity. They are not convoluted by other material things or worrying about society's approval. they exist to exist.