50 year celebration! D&D Ingredients of Delphos celebrated 50 years of business on Saturday. D&D Ingredients was founded in 1976 by Doc and Dorothy Miller with a vision to serve the animal feed and pet food industries with quality, reliability, and care. It has grown into a full-service ingredient manufacturer and distributor reaching customers in 45 states and 42 countries. Today, D&D Ingredients employs 160 people, operates more than 500,000 square feet of warehouse space, and maintains an ingredient inventory of over 900 items.