Offer available to veterinary customers in the U.S. only on eligible combination purchases beginning June 1, 2019. To be eligible for offer, customer must provide proof of qualifying purchase via the online redemption process by uploading a copy of their invoice. Distributor stocking orders do not qualify. Promotion cannot be combined with any other promotion, offer, coupon or special pricing. Please allow 6 - 8 weeks for receipt of no-charge products.