Thumb Score: +7 Amazon [amazon.com] has Frontline Plus Flea and Tick Treatment (Large Dogs 45-88 Pounds, 3 Doses) on sale for $24.47 when you check out with Subscribe & Save. Shipping is free w/ Prime or on $35+. Product Description from Amazon[LIST][*]Waterproof flea and tick treatment for dogs: Frontline Plus for Dogs provides waterproof, fast-acting, long-lasting flea and tick treatment and control for your dog.