Petco is a famous retailer of pet food. Its story began in 1965 when Walter Evans opened its first veterinary store in La Mesa, California. Their aim was to buy high-grade pet products and sell them at reduced prices. The people started to buy from them, having these discounts prices. Little by little they introduced new products from Iams, nitro, Purina, and many others. When the sales began to grow, they asked fo