Why Not Kibble
RAW IS BY INSTINCT
The birth of the commercial industry was put down to observation of watching street dogs eating the scraps of sailors, which were ration biscuits of not very nutritional value, and then thinking he could do better in a biscuit for dogs, adapted it to what was believed more nutritional. This was taken up in gusto by the ones that could afford it and thus began the marketing and production to what we know of today.
Seeing as the manufacturing process worked so well for cats and dogs, it made sense that industry could adapt for all types including the equine industry....