Livonia, Mich. — The largest multi-unit operator of Pet Supplies Plus, US Retail Holdings, has signed a deal to purchase 29 Wag ‘N Wash stores. This agreement follows their previous development announcement to open 20 additional Pet Supplies Plus stores over the next 5 years. The entrepreneurs behind US Retail Holdings are Aaron Young, Chad Bush and Doug DeLozier, who collectively have over 60 years of PSP experience and own and operate 49 Pet Supplies Plus stores across Alabama, Michigan, Tennessee, Virginia, Wisconsin and Texas. Over the next 4 years, …