What is missing in this discussion is an appreciation that all animals with the exception of humanity rely on mind to mind communication in the first place. Because we do not, we naturally discount the ability of others.
Yet those others use this talent extensively including against prey that then think they are not there. In fact our own inability to observe game can be traced back to this phenomena. A herd of deer could graze nearby in the midst of hunting season with this trick and probably do in order to protect themselves.
The methods described here can be used to research this phenomena and should be.