Hookworms in Dogs and Cats: What Every Pet Owner Should Know

What Are Hookworms?

Hookworms (Ancylostoma species) are small intestinal parasites that attach to the lining of your pet’s gut and feed on blood. Despite their tiny size — usually less than half an inch long — hookworms can cause serious health problems in both dogs and cats, especially in young animals or those with weakened immune systems.

These parasites get their name from the hook-like teeth they use to latch onto the intestinal wall. Once attached, they feed continuously, which can lead to significant blood loss over time.

How Pets Get Hookworms

Hookworms are sneaky. Your pet doesn’t have to eat something gross to pick them up — though that’s one way it happens. Here are the most common routes of infection:

Skin Penetration

Hookworm larvae live in contaminated soil and can burrow directly through your pet’s skin, usually through the paw pads. Dogs and cats that walk on infected ground — especially in warm, moist environments like we have here in the St. Petersburg area — are at risk even without ingesting anything.

Ingesting Larvae

Pets can swallow hookworm larvae while grooming dirty paws, eating contaminated soil, or drinking from puddles in areas where infected animals have been.

Through Mother’s Milk

Puppies and kittens can contract hookworms from their mother’s milk during nursing. This is one of the reasons young animals are particularly vulnerable and why early deworming protocols matter so much.

Symptoms to Watch For

Hookworm infections range from mild to life-threatening depending on the number of parasites and your pet’s overall health. Signs to watch for include:

• Anemia — Pale gums are a telltale sign. Because hookworms feed on blood, a heavy infestation can cause dangerous levels of blood loss, particularly in puppies and kittens.
• Bloody or dark, tarry stool — Digested blood in the stool is a common indicator of hookworm infection.
• Weight loss and poor appetite — Chronic infection drains your pet’s nutrition and energy.
• Dull coat and general weakness — Ongoing blood loss takes a visible toll.
• Skin irritation on paws — If larvae entered through the skin, you may notice redness or itching between the toes.

In severe cases — especially in very young animals — hookworms can be fatal without treatment.

How Hookworms Are Diagnosed

Diagnosis is straightforward. Our veterinary team performs a fecal flotation test, which involves examining a stool sample under a microscope to identify hookworm eggs. This is part of the routine wellness screening we recommend for all pets at Community Animal Hospitals.

Keep in mind that very young puppies and kittens may show symptoms before eggs appear in the stool, so clinical signs combined with the animal’s age and history also guide diagnosis.

Treatment Options

The good news: hookworms are treatable. Deworming medications (anthelmintics) are highly effective at eliminating adult hookworms. Treatment typically involves:

• An initial deworming dose followed by a second dose two to three weeks later to catch any larvae that have matured since the first treatment.
• Iron supplements or supportive care for pets with significant anemia.
• Nutritional support to help your pet recover strength and body condition.

Severe cases in puppies or kittens may require blood transfusions, which is why early detection matters.

Prevention Is the Best Strategy

Preventing hookworms is far easier than treating an active infection. Here’s what works:

• Year-round preventive medication — Many monthly heartworm preventives also protect against hookworms. In Florida’s warm climate, year-round prevention is essential since parasites don’t take a winter break here.
• Regular fecal testing — Annual (or twice-yearly) stool checks catch infections early before they cause serious problems.
• Clean up after your pet — Promptly removing feces from your yard reduces environmental contamination.
• Avoid high-risk areas — Dog parks, sandy areas, and spots with poor drainage can harbor hookworm larvae.
• Deworm puppies and kittens early — Starting at two weeks of age, with repeated treatments per your veterinarian’s protocol.

Can Humans Get Hookworms?

Yes. Hookworms are zoonotic, meaning they can infect people too. Human infection usually happens when hookworm larvae in contaminated soil penetrate exposed skin — typically bare feet. This causes a condition called cutaneous larva migrans, an itchy, red, winding rash. Children who play in sandboxes or bare soil are especially at risk.

Keeping your pets on preventive medication and practicing good hygiene protects your whole family.

Schedule a Parasite Screening Today

Hookworms are common in Florida, and many infected pets show no symptoms in the early stages. A simple fecal test can catch the problem before it becomes serious. If your dog or cat is due for a wellness check or you’ve noticed any of the symptoms described above, call Community Animal Hospitals at (727) 592-1816 to schedule an appointment with Dr. Leslie Block, Dr. Craig Mullenax, or Dr. Mark Williamson.

Parasite prevention is one of the simplest things you can do to keep your pet healthy. Let’s make sure your furry family member is protected.