Seltzer recommends that all dogs — no matter the season or where they live — should be on a good year-round flea control. “As a dermatologist, 75 percent of what I see are allergies, and for any environmentally allergic dog, a good proportion of them will have a flea allergy dermatitis,” Seltzer explains. “Fleas can live in the environment for a really long time. It can take 10 days of freezing temperatures for fleas to die, plus they like to live in households year-round.”
Quick-acting oral flea and tick control products, such as fluralaner (Bravecto), sarolaner (Simparica) and afoxolaner (NexGard), can kill adult fleas on an animal within 24 hours. There are also topical treatments and sprays, such as fipronil (Frontline), imidacloprid (Advantage) and selamectin (Revolution), Seltzer explains, though your veterinarian will prescribe the type of medicine that is right for your pet’s personality and lifestyle.
It’s also important to make sure you’re treating all animals in the household, not just the one showing symptoms. “I get plenty of owners who don’t want to treat cats because they don’t go outside,” Seltzer explained. “But if you have a dog who goes outside, you need to make sure you’re treating all in-contact animals, or you’re still getting exposure.” However, if you have other pets who aren't cats or dogs, check with an experienced vet before treating them — some dog and cat flea medications can be deadly to other animals.