No, Frontline Plus for dogs should not be used on cats. The formulations for Frontline Plus for dogs and cats are different, and the product designed for dogs contains ingredients that can be toxic to cats if applied to them.
Frontline Plus for dogs contains the active ingredients fipronil and (S)-methoprene, which are in concentrations suitable for dogs but can be harmful to cats. Cats are more sensitive to certain chemicals, including those found in dog flea and tick products.
Using Frontline Plus for dogs on cats can lead to serious adverse reactions and even toxicity in cats. Therefore, it's crucial to always use flea and tick products that are specifically formulated and labeled for use in cats if you're treating a feline companion.
If you have both dogs and cats in your household, make sure to keep them separated after applying any flea and tick treatment to your dogs until the product has dried completely. And always read and follow the instructions on the product label carefully to ensure the safety of your pets.