Advocate for dogs is a great product.  It will protect your dog from a wide range of parasites in one single monthly spot on application. . Advocate will protect your dog from fleas, roundworm, whipworm, hookworm, mites and lice. Advocate is so easy to apply - just a few drops on the back of the neck once a month.   Adovocate comes in different sizes for different dogs.  Advocate also comes in a 3 month pack a 6 month pack or grab a bargain and get a 12 month pack.