I got a big bag of beef scrap fat from the butcher for free. I tossed it into the crock pot and cooked it a long long time. The fat melted and the moisture evaporated, leaving liquid and big chunks of what looked like pork rinds. So I used a slotted spoon to pull out the crispy protein bits, crunched them up and put some extra chick food into it to soak up the grease, stirred it all together, and tossed it to some very happy chickens. Then I mixed a ton of scratch with the liquid fat and poured into a mold to make homemade suet cakes.