Yep. 100% lard--or any oil for that matter (except castor, mineral or motor)--is possible. You just plug that oil into your soap calculator of choice, set the percentage at 100 and hit calculate. It will give you the amount of water and NaOH that you need to combine for your lye solution to saponify the selected amount of lard. I know some people on the forum have made single oil sample batches to determine the properties of the soap that particular oil produces. That sounds like a worthwhile experiment for me to do, someday. But not today. Tomorrow ain't lookin' too good, either.