People can often eat the higher quality food directly instead of feeding it to animals, which matters if food is scarce or expensive. On the other hand, if you want to convert grass to calories for humans, feeding it to a cow is a pretty reasonable way to do it.
People can often eat the higher quality food directly instead of feeding it to animals, which matters if food is scarce or expensive. On the other hand, if you want to convert grass to calories for humans, feeding it to a cow is a pretty reasonable way to do it.