Heartworm Tool Kit (AHS Treatment Plan App)
Assess your dog's heartworm risk based on location, season, and lifestyle. Get personalized prevention recommendations to keep your dog safe.
Open PlannerParassess is a veterinary risk assessment tool that evaluates an individual pet's exposure risk for a range of common parasites - including fleas, ticks, heartworm, intestinal parasites, and mange mites - based on geographic location, lifestyle factors, and pet demographics. Understanding your pet's actual parasite risk helps you make informed decisions about prevention protocols, choose appropriate products, and discuss optimal screening frequency with your veterinarian.
Parasite Risk Factors by Lifestyle
Use the table below to compare Parasite Risk Factors by Lifestyle.
| Lifestyle Factor | Parasites at Higher Risk | Recommended Prevention Change |
|---|---|---|
| Outdoor access (any level) | Fleas, ticks, roundworms, hookworms, heartworm (in endemic areas) | Year-round broad-spectrum prevention essential |
| Rural area / woods / tall grass | Ticks (Lyme, RMSF, Anaplasmosis), mange mites | Tick prevention critical; check dog after every outing |
| Boarding or daycare | Fleas, kennel cough (not a parasite but related), Giardia | Confirm flea prevention current before boarding |
| Dog parks | Giardia, intestinal worms (from soil), Campylobacter | Fecal test every 6 months for high-exposure dogs |
| Wildlife contact (hunting dogs) | Ticks, Giardia, Cryptosporidium, Bartonella | Maximum tick control; regular fecal PCR panels |
| Multi-pet household | Fleas (rapid spread), ear mites, Giardia | All pets must be on prevention simultaneously |
| Indoor only (true) | Lower risk but not zero | Core prevention still recommended; heartworm maps expanding |
Parasite Prevention Products Comparison
Use the table below to compare Parasite Prevention Products Comparison.
| Product | Target Parasites | Species | Administration | Duration | Key Features |
|---|---|---|---|---|---|
| Simparica Trio | Fleas, ticks (8 species), heartworm, roundworm, hookworm | Dogs | Monthly oral chew | 30 days | Broadest single-product coverage |
| Bravecto | Fleas, ticks | Dogs and cats | Oral (dog) or topical (cat/dog) | 3 months | Long-duration flea/tick control |
| Revolution Plus | Fleas, ticks, heartworm, roundworm, hookworm, mites | Cats | Monthly topical | 30 days | Comprehensive cat prevention |
| Advantage Multi | Fleas, heartworm, roundworm, hookworm, mange mites | Dogs and cats | Monthly topical | 30 days | Good value; no tick control |
| Interceptor Plus | Heartworm, roundworm, hookworm, whipworm, tapeworm | Dogs | Monthly oral | 30 days | Good intestinal coverage; no flea/tick |
Geographic Heartworm Risk Map
Use the table below to compare Geographic Heartworm Risk Map.
| Region | Heartworm Risk | Recommended Prevention Season |
|---|---|---|
| Southeast US (Gulf Coast states) | High - year-round transmission possible | Year-round prevention mandatory |
| Midwest US | Moderate-high - seasonal | Year-round prevention recommended due to irregular weather |
| Northeast US | Moderate - expanding range | Year-round prevention recommended; historically seasonal |
| Northwest US (Pacific) | Lower but present | Year-round prevention strongly recommended |
| Canada (Southern provinces) | Low but present and expanding | April-November minimum; year-round in mild coastal areas |
| UK/Europe | Generally low | Prevention on travel; localized risk in some Mediterranean areas |
Frequently Asked Questions
Can my strictly indoor cat get fleas?
Yes. Fleas enter homes on human clothing and shoes, through window screens, and on other animals (dogs that go outside). Once in a home, a single flea can multiply to thousands within weeks. Indoor-only cats should still be on monthly flea prevention, particularly in households with any outdoor pets or in regions with high flea pressure.
How often should I do fecal parasite testing for my dog?
CAPC (Companion Animal Parasite Council) recommends fecal testing 4 times per year for puppies and high-exposure adult dogs, and 1-2 times per year for low-exposure adult dogs. Dogs on appropriate preventives should still be tested because resistant strains are emerging (particularly hookworm resistance to macrolides) and some parasites are not fully covered by standard preventives.
Note: Parasite risk depends on location, season, travel, outdoor exposure, and prevention routine.
Helpful related calculators
Continue with Heartworm Tool Kit (AHS Treatment Plan App), PetMD Symptom Checker, Dog Veterinary Care Calculator for the next practical step.
