Use Nutri-Vet Guard+ for Dogs monthly for control of fleas, ticks and chewing lice. Studies show that Nutri-Vet Guard+ for Dogs kills adult fleas, flea eggs, and flea larvae and prevents development of all flea states for up to six weeks. Apply monthly if your dog is at high risk for flea reinfestation, or in a highly infested environment. Apply monthly to control ticks and chewing lice. Nutri-Vet Guard+ for Dogs remains effective, even after bathing, water immersion, or exposure to sunlight. Allow treated area to dry thoroughly. Avoid contact with treated area until dry. Do not reapply for 30 days. Nutri-Vet Guard+ for Dogs can be used on breeding, pregnant and lactating female dogs. | Nutri Vet Guard+ Flea and Tick Control for X-Large Breed Dogs | Size 3 dose