Used Frontline for dogs by mistake on a cat can it be lethal?

Yes, using Frontline for dogs on a cat can be lethal. Frontline for dogs contains permethrin, which is toxic to cats. Even small amounts of permethrin can cause serious health problems in cats, including seizures, tremors, and even death.

If you have used Frontline for dogs on your cat, it is important to seek veterinary attention immediately. The veterinarian will be able to assess your cat's condition and provide the appropriate treatment.

Here are some symptoms of permethrin poisoning in cats:

* Seizures

* Tremors

* Vomiting

* Diarrhea

* Lethargy

* Difficulty breathing

* Death

If you see any of these symptoms in your cat, it is important to seek veterinary attention immediately.