Two actives, one collar, 8 months by Elanco's count.
A flea and tick collar with imidacloprid and flumethrin. Elanco says one collar stays effective for 8 months, less if your dog swims monthly. Ask your vet if it fits your dog.
Best for: Owners who'd rather not track a monthly dose
Skip it if: Your dog weighs 18 lbs or less or is under 7 weeks old.
What's in itActive ingredients: imidacloprid and flumethrin.
8 monthsElanco says one collar stays effective for 8 months; frequent swimmers get less.
Large dogsThis listing is the collar for dogs over 18 lbs.
The catch: Made for dogs over 18 lbs. Smaller dog? This isn't your collar.
Skip it if: Your dog weighs 18 lbs or less or is under 7 weeks old. This listing is the large-dog collar.
Still your mess? Seresto Flea & Tick Collar is the one.
