Simparica Trio Chewable Tablets vs Simparica Trio Chewable Tablet for Dogs

These are the same drug, sarolaner, moxidectin and pyrantel, in the same liver-flavored monthly chew. The only real difference is the weight band: A is dosed for dogs 2.8 to 5.5 lb, B for dogs 11.1 to 22 lb. Buy the one that matches your dog's current weight. Both carry the same FDA approval for six tick types, heartworm, fleas, flea tapeworms, roundworms and hookworms, and owners consistently report dogs eat them readily.

• Choose the Simparica Trio 2.8-5.5 lb if your dog weighs between 2.8 and 5.5 pounds, such as a toy breed puppy or small adult dog.
• Choose the Zoetis Simparica Trio 11.1-22 lb if your dog weighs between 11.1 and 22 pounds, a small-to-medium adult or a puppy past eight weeks.