Trifexis
A once a month flavor tab for dogs that prevents heartworm disease, kills fleas, and controls hookworm, roundworm, and whipworm infection. 

Sentinel Spectrum
A once a month beefy chew that prevents heartworm disease, sterilizes fleas, controls hookworms, roundworms, whipworms and tapeworms.

Sentinel
A once a month beef flavored tablet that prevents heartworm disease, sterilizes fleas, controls hookworms, roundworms and whipworms.  This is our best value for heartworm prevention. 

Revolution
A once a month topical liquid for dogs and cats.  Prevents heartworm disease, fleas, ear mites, hookworm, round worm infections and sarcoptic mange.