Choose from 7 PetPlus coupons that include promo codes and free shipping deals for September 2016. Our top coupon is a 20% Off coupon code. Use your coupon to save on pet medications and supplies at PetPlus. Save money on pet prescriptions when you become a member with PetPlus. Get wholesale pricing and free delivery on items your pets need, including RX food and flea and tick treatments. See how much you can save when you join PetPlus.