It’s a common myth that indoor cats don’t get fleas. Cats can be exposed to parasites in many ways, including other pets or people, open windows, contact with infested items and more.¹

1. Flea Prevalence in Dogs and Cats. Today’s Veterinary Practice. Published 2015.https://todaysveterinarypractice.com/infectious-disease/flea-prevalence-in-dogs-cats Accessed June 25, 2026.

With tick populations growing and spreading into new areas, it’s more important than ever to ensure cats are protected year-round.²

2. McClung KL, Little SE. Amblyomma americanum (lone star tick). Trends Parasitol. 2023;39(1):70-71. doi:10.1016/j.pt.2022.10.005.

Roundworms are the most common intestinal parasite in cats and, while adult cats often show no symptoms, infestations can be fatal in kittens.³

3. Parasite Prevalence Maps. Companion Animal Parasite Council. Published 2025. https://capcvet.org/maps/#/2025/all-year/roundworm/cat/united-states Accessed April 30, 2026.

While less common than dogs, cats can still contract heartworm disease. All it takes is a single bite from an infected mosquito to transmit heartworm larvae and there is no effective treatment available for cats.⁴

4. Parasite Prevalence Maps. (2026). Companion Animal Parasite Council. https://capcvet.org/maps/#/2025/all-year/feline-heartworm-ab/cat/united-states

Frequent grooming and the tendency to prey on animals puts cats at a higher risk of contracting tapeworms. That’s why flea prevention is so important, even for indoor cats.