Grease is grease, fat is fat. Don't matter where it came from.
Well to be the Devil's adivcate.! That ain't so.!
A fat rabbit in winter need's to run fast or be supper for Fox,(herbivore)
A fat deer needs to be wary and hide,(undulate)
A fat bear needs stored fat too sleep, (omnivore)
Hummingbirds and Whales both knew to go south to eat.
"Fat", is different than, "tallow". "Lard" is pigs or/ cows fat and tallow mixed and rendered twice to a high temp,,aka, "lard'
And, Crisco is vegetable a oil! a mix of cottonseed and soybean!
now how did great great grandpa,, ever get patch lube oil out of a cottonseed?,,I don't get it,,,is all this stuff the same?