Print a high-value $5.00 Petco coupon! It is valid on any bag of Purina Pro Plan pet food or Purina Pro Plan Perform cat litter. Take the coupon to Petsmart where 3.2-pound bags of Purina Pro Plan cat food are on sale for $10.00 through 10/4. Petsmart accepts competitor coupons and will accept the $5.00 coupon below. The final price will be only $5.00 per bag!