Simparica Trio Chewable Tablets vs Simparica Trio Chewable Tablets for Dogs

These are the same drug, Simparica Trio, in different weight-band boxes, so the choice comes down to your dog's weight, not the formula. Both are once-monthly liver-flavored chews that kill fleas, ticks, heartworm larvae, roundworms, hookworms and flea tapeworms. Owners and vets rate the chew highly for palatability and fast flea kill, and the 4.6 rating holds across both listings. Buy the box that matches your dog's current weight, and recheck the band as a puppy grows.

• Choose the Simparica Trio 2.8-5.5 lb box if your dog weighs between 2.8 and 5.5 pounds, such as a small adult breed or a young puppy past eight weeks.
• Choose the Simparica Trio 88.1-132 lb box if your dog weighs between 88.1 and 132 pounds, such as a large or giant breed.