Born from Joseph Sporn’s pioneering Upper West Side dog daycare, Yuppie Puppy Pet Products has made pet-care products since 1987, best known for its patented Sporn no-pull dog harness. The company also produces durable chew toys and has sold more than 15 million harnesses worldwide. Its products have been carried by Walmart since a 1994 trade-show demonstration launched a three-decade retail partnership.