 | Sentinel Spectrum Green For Dogs 8.1-25 Lbs 6 Chews. Sentinel Spectrum is a palatable, beef-flavored oral treatment for dogs. The monthly formula protects canines against fleas, heartworms, as well as intestinal worms such as roundworms, hookworms, whipworms, and flea eggs.... - Sentinel Spectrum Green For Dogs 8.1-25 Lbs 6 Chews. |