Heartworm prevention should run every month, all year, for dogs and cats in Indian Land, because mosquitoes here spread heartworm and South Carolina ranks among the worst states in the country for it. Prevention is a monthly chew or topical, or an injection every 6 or 12 months, started after a heartworm test for adult dogs. Petfolk Veterinary & Urgent Care - Indian Land is a veterinary clinic off Charlotte Highway in Indian Land, South Carolina, and it helps you pick a preventive your pet will actually take, then keeps the doses and the yearly test on schedule.
Call (803) 232-9817 or book online.
How common is heartworm around Indian Land?
Heartworm is common enough here that Petfolk Indian Land treats prevention as a year-round habit. The American Heartworm Society's 2025 incidence survey named the central Carolinas a new heartworm hot spot, meaning diagnosed infections there have become more concentrated since the last survey. The Asian tiger mosquito, the most common daytime-biting mosquito in the Carolinas, spreads dog heartworm, according to Clemson Extension. So an afternoon in the yard counts, not only evenings at a ballgame by the Indian Land Recreation Center fields.
How does a mosquito bite turn into heartworm disease?
Heartworm is not passed directly from dog to dog; it needs a mosquito, and it takes about six months to become an adult worm.
1. Day 0. A mosquito bites an infected animal (a dog, coyote or fox), picks up tiny immature worms called microfilariae and, after they develop inside the mosquito, passes them on as larvae when it bites your pet. There is no sign of the bite that matters. 2. The first 30 to 60 days. Monthly preventives don't form a shield. They work backward, killing the young larvae that entered over the previous month or so, before they grow too large. A dose given late can leave older larvae alive. 3. Around month 6. Surviving larvae reach the heart and the arteries of the lungs and mature into adult worms that can grow up to about a foot long. Dogs often look normal for a long time; early signs are a mild cough, tiring easily on walks and weight loss.
This lag is why a missed dose in spring may not show up on a test until autumn, and why the vet at Petfolk Indian Land asks about gaps before refilling.
What are the heartworm prevention options for dogs and cats?
At Petfolk Indian Land, the vet matches the option to how your household works.
Monthly chewable tablet. For dogs that take treats easily; many also cover fleas, ticks or intestinal worms.
Monthly topical liquid. For dogs that refuse pills; some also cover fleas.
Injection at the clinic, every 6 or 12 months. For busy households where monthly doses slip.
For cats, monthly topical or oral products. There is no approved treatment to kill adult heartworms in cats, so prevention is the only protection. Indoor cats get bitten by mosquitoes that come inside, too.
The American Heartworm Society advises giving prevention all twelve months, and mild winter spells in the Carolinas let mosquitoes come out on warm days.
Which preventives do Petfolk pets around Charlotte use?
Most dogs at Petfolk's clinics around Charlotte are on a monthly chew that covers heartworm, fleas and ticks in one dose.
At Petfolk Indian Land, about 3 in 4 dog heartworm-prevention orders (77%) are Simparica Trio, a monthly chew, and about 1 in 11 (9%) are the ProHeart injection (May 8, 2026, when the clinic opened, to Oct 19, 2026).
Across Petfolk's Charlotte-area clinics, about 85% of dog parasite-prevention orders are Simparica Trio (Oct 2025 to Sep 2026).
For cats, 86% of parasite-prevention orders across Petfolk's Charlotte-area clinics are Revolution Plus, a monthly topical (Oct 2025 to Sep 2026).
Why does my dog need a heartworm test every year?
Dogs on year-round prevention at Petfolk Indian Land still get a heartworm test every year. It confirms the program is working, catches infections from a missed or spit-out dose, and is required by most product makers before a refill. If you switch products or have a gap, the vet may suggest a retest about six months later. The heartworm testing page explains how the test is done and what a result means.
How do I start or restart heartworm prevention?
Bring the name of any product your pet has been on and the date of the last dose to Petfolk Indian Land.
1. Test first if there has been a gap. Starting some preventives in a dog that already has heartworm can cause a reaction. 2. Weigh your pet. Doses go by weight. 3. Pick the product. Many plans also cover intestinal worms; deworming explains which ones. 4. Set reminders. You leave with a plan and a reminder schedule.
Puppies can start prevention young, at the age on the product label, and are tested once they are old enough for adult worms to show.
When are heartworm signs an emergency?
Go to a 24-hour emergency hospital if your dog suddenly collapses, struggles to breathe, has pale gums or passes dark brown urine. Those signs need care right away, whatever the cause. A mild cough or a missed dose can wait for a regular visit at Petfolk Indian Land.
How do I book heartworm prevention in Indian Land?
Looking for a vet in Indian Land to start or refill prevention? Petfolk Veterinary & Urgent Care - Indian Land is at 1150 Sherbrook Ave, Ste B109, Indian Land, SC 29707. Call (803) 232-9817 or book online.
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Heartworm prevention questions
Off Charlotte Highway, north of the rec center