Dog & cat health · Vet-reviewed guide

Prevent Ticks on Dogs and Fleas: A Vet-Guided Year-Round Plan

The best flea and tick treatment is the one that stops an infestation before it starts. Prevention is cheaper, easier, and far less miserable than the alternative.

Quick answer: The best flea and tick prevention for dogs and cats is a year-round, vet-recommended preventive, because consistent prevention is far more effective and less stressful than treating an infestation or a tick-borne disease after the fact. Prescription and vet-grade preventives come as monthly chews, spot-on treatments, and long-acting collars, and they are the most reliable defense against fleas, ticks, and the diseases ticks carry.

Prevention should run all year, not just in summer, because fleas survive indoors and ticks can be active in mild winter weather. Alongside a preventive, simple habits help: check your pet for ticks after time outdoors, keep grass and brush trimmed, wash bedding, and vacuum regularly. A key safety point is that products are species-specific, never use a dog product on a cat. This guide covers how to build a prevention plan with your vet.

Why prevention beats treatment

Clearing an established flea infestation from a home takes weeks, and a tick-borne disease can mean lasting illness.¹ Consistent, year-round prevention avoids both, and modern vet-guided preventives are highly effective. It is cheaper and kinder to prevent than to treat.

The types of preventive

• Oral preventives (chews). Monthly or longer-acting tablets that kill fleas and ticks; convenient and not affected by bathing or swimming.¹
• Spot-on (topical) treatments. Applied to the skin between the shoulder blades, monthly.
• Collars. Long-acting flea and tick collars that can last several months.

Which is best depends on your pet, your area's tick species, and your lifestyle, so your vet's guidance matters. Prescription options are generally the most reliable, and if your pet needs one, our licensed veterinarians can review your pet and issue a prescription when appropriate. See how our vet prescription service works.

Run prevention all year

Fleas live happily indoors in heated homes through winter, and ticks can be active any time the weather is above freezing, so year-round prevention is the current veterinary recommendation rather than seasonal use.¹

Habits that help alongside a preventive

• Check your pet for ticks after walks, especially the ears, feet, and groin
• Keep lawns mowed and clear brush and leaf litter where ticks live
• Wash pet bedding in hot water and vacuum regularly to disrupt the flea life cycle
• Treat every pet in the home so they don't re-infest each other²

The critical safety rule

Flea and tick products are species-specific: do not use a dog product on a cat. Never use, and do not use, a dog product on a cat, many contain permethrin, which is toxic and can be fatal to cats.² See our guide on fleas on cats for cat-safe steps, and fleas on dogs and ticks on dogs for the wider picture.