Simparica Trio Chewable Tablets vs Simparica Trio XL Chew for Dogs

Both are the same drug, Simparica Trio, so the real difference is the weight band and pack size, not the formula. Product A is the 2.8–5.5 lb chew in a 6-month supply, built for small adult dogs. Product B is the 88.1–132 lb chew, a 3-pack for very large dogs. Owners and reviewers report the same things on both: fast flea kill, easy liver-flavored chews, and solid tick and heartworm coverage. Pick by your dog's weight, not by rating.

• Choose the Simparica Trio 2.8–5.5 lb 6-pack if you have a small dog in that weight band and want a six-month supply in one box.
• Choose the Simparica Trio 88.1–132 lb if your dog is a large or giant breed in that range and you want a three-month supply.