Sam, we feed cake to our cows too. Dad would usually buy 3 or 4 tons of it. Before we fed it, we would empty a sack into a sifter box, and sift any powder out of it and sack it up in flour sacks. He used this to feed sick cows and calves. Dad didn't like the truck mounted feeders either, so we would load sacks in the truck the walk with the sack, spreading the cake.
Feeding cake is also what ended my father's cattle ranching. His cows were like pets and like being hand fed. While hand feeding some cake, a young heifer cut the line to get a hand out, and one of the matron cows objected pushing the heifer right over the top of Dad, breaking his hip. He was 76 yrs old, and decided it was time to retire. I sure don't miss shifting the cake though.
