If you have ever skipped flea, tick, or heartworm prevention in the “off season,” you are not alone. A lot of pet owners learned the old rule: use preventives when the weather is warm, then stop when winter comes.

That advice is getting less reliable.

The Companion Animal Parasite Council’s 2026 Pet Parasite Forecast projects continued spread of heartworm disease, Lyme disease, ehrlichiosis, and anaplasmosis in dogs across the United States, including growth in areas once considered lower risk. CAPC says its annual forecasts are built from more than a decade of surveillance and millions of veterinary diagnostic test results, and are meant to help veterinarians understand what is likely happening in their local area.

For pet owners, the message is practical: parasite prevention should not be a guessing game. It should be a plan.

“Low risk” may not mean what it used to

Parasites move with pets, wildlife, mosquitoes, ticks, weather patterns, and travel. CAPC’s 2026 forecast points to heartworm risk remaining strong in the Southeast while continuing to push north along the Mississippi River corridor and Atlantic coast. Tick-borne disease risks are also shifting, with Lyme disease, ehrlichiosis, and anaplasmosis showing expansion in different regions.

That does not mean every pet needs the same product. It means your pet’s risk depends on where you live, where your pet travels, and how your pet spends time.

A couch-loving senior cat, a dog who hikes every weekend, a puppy in daycare, and a rescue dog recently transported from another state may all need different prevention conversations. This is where a good local veterinarian matters.

Veterinary teams can help interpret which parasites are common in your practice area and recommend prevention options that fit your pet’s species, weight, lifestyle, health needs, and your budget. That kind of local guidance is hard to replace with a generic online quiz or a one-size-fits-all subscription box.

Prevention is also a safety issue

Flea and tick products can be very effective, but they are still medications or pesticides. The U.S. Environmental Protection Agency advises pet owners to consult a veterinarian, follow label directions carefully, use products only for the species and weight listed, and never apply dog products to cats. That last point is especially important in multi-pet homes.

The FDA also warns pet owners to be careful when buying pet medications online. A legitimate online pharmacy cannot sell prescription veterinary medicine without a valid prescription from a licensed veterinarian. If a medicine looks different, does not seem to work, or your pet has a reaction, the FDA advises contacting your veterinarian first.

In plain English: bargain hunting is understandable, but do not separate the product from the medical advice. The cheapest box is not a deal if it is the wrong dose, the wrong species, the wrong coverage, or from a questionable source.

Ask for a prevention plan, not just a product

At your next visit, try asking your veterinary team these five questions:

1. What parasites are you seeing most in our area right now? Your vet may be tracking local heartworm tests, tick-borne disease screens, flea problems, or intestinal parasites.

2. Does my pet need year-round protection? AAHA and parasite experts emphasize consistent prevention because fleas, ticks, mosquitoes, and intestinal parasites do not always follow a neat calendar.

3. What does this product cover — and what does it not cover? Some products cover fleas and ticks only. Others may include heartworm prevention or certain intestinal parasites. Ask before assuming.

4. What testing should we do each year? The American Heartworm Society recommends year-round heartworm prevention, and AAHA notes that routine parasite testing helps confirm a prevention plan is working.

5. If cost is a concern, what are my safest options? Your vet may be able to compare monthly versus longer-acting products, manufacturer rebates, written prescriptions, clinic online pharmacies, or staged purchases.

Supporting local care starts with using local knowledge

Choosing an independent veterinarian is not just about who owns the building. It is about having a care team that knows your pet over time and knows your community up close.

That relationship becomes especially useful when health risks are changing. A local independent vet can help you avoid both under-protecting and overbuying. They can explain why your indoor cat may still need parasite protection, why your dog needs a yearly heartworm test even when you give preventives, or why a product that worked for your last pet may not be the best choice now.

Parasite prevention is one of the quieter parts of pet care. When it works, nothing dramatic happens — no fleas in the house, no tick-borne disease surprise, no heartworm diagnosis months later. That is the point.

So this year, do not just grab whatever is on sale. Ask your local veterinary team for a prevention plan that fits your pet, your ZIP code, and your budget. It is one of the simplest ways to protect your pet while keeping trusted local veterinary care at the center of the decision.