But talking about creators of mammal humanoids we must not forget that , all life of the biopsheres was created initially spiritually at higher frequency (density-resolution) physical realities (see post 3) by many spiritual creators, before the Founders launched the (already existing) biospheres in the visible (3rd density) physical reality. This should apply to mammal humanoids. It might be also the case that originally (billions of years ago) there were also giant 10-meters high mammal humanoids. And there are indications that there might exist such giant humanoids on earth , more than 200 million years ago, before the Permian extinction of mammals on earth. (See e.g. post 11 and https://www.youtube.com/watch?v=dRuxw-nZoJw&feature=fvwrel )
About this "Fall" to the visible physical reality (probably from the ethereal 4th density reality) , and that original way of feeding of man that was not the carnivorous habits, there are teachings by Byzantine metaphysical philosophers, like Saint Gregory from Nyssa (http://en.wikipedia.org/wiki/Saint_Gregory_of_Nyssa) in his book "About the construction of Man" Tertios editions (Town of Katerini Greece) pages 337-341.