Save 20% on your entire order when you purchase your pet's Heartworm and Flea & Tick Spot On together with the code COMBO27. This is the best deal we have seen from them all year - it is very rare that they have a discount this high, so take advantage and stock up on all your pet care needs! Please note, this deal applies to the regular price of items, not the Internet price. So, for example, the Internet price of K9 Advantix 2 is $45.99, yet this code will take 20% off the regular price of $52.99, dropping the price to $42.39 - a bigger savings than the Internet only pricing. Plus, take $10 off your entire order with the code ENT15. Shipping starts at $5.99 or is free over $35. There is no sales tax (except NY).