i have had all three (moose,elk and bison) well both wild and domestic elk and only domestic bison.I think pemmican was made more by the nomadic indians, but I am not exactly sure. I have not had elk, moose and bison to compare their fat. I guess if it was all you knew, you'd get used to it. Or if you were really hungry!
I'm not staving enough to eat deer fat yet.