Livonia, Mich. — Pet Supplies Plus, the largest independent pet retailer in North America with over 660 stores in 41 states, and Wag N’ Wash, the emerging grooming, self-wash and natural pet food franchise, are expanding in the Northeastern United States through their latest acquisition of 20 Loyal Companion pet stores from their parent company, Independent Pet Partners. Of these 20 stores located in Massachusetts, Maryland, Maine, New Hampshire and Virginia, 10 will be Pet Supplies Plus stores and 10 will be Wag N’ Wash stores. “This is an incredible …