Hookworms in Dogs and Cats
A Pet Owner’s Guide to Hookworms
Everything you need to know to keep your new puppy or kitten safe from these dangerous parasites.
What Are Hookworms?
Hookworms are tiny worms that can infect your puppy or kitten. They “hook” themselves to the inside of your pet’s intestines and feed on their blood.
A few hookworms might not cause problems, but a heavy infection can make your new pet very sick and can even be deadly. This guide will walk you through the essentials of keeping your pet safe.
The Hookworm Lifecycle
Understanding how hookworms spread is the first step to stopping them. It’s a cycle that starts and ends with your pet, which is why vet care and a clean environment are so important.
An infected pet passes thousands of invisible eggs in its poop.
In a few days, eggs in the soil hatch into tiny baby worms (larvae).
In about a week, the larvae grow and are now ready to infect a new pet.
The cycle repeats when a pet swallows the larvae or they burrow through the skin.
How Puppies and Kittens Get Infected
Puppies: A Danger from Mom
The #1 way puppies get hookworms is directly from their mother’s milk. Even if the mother seems healthy, she can pass dormant worms to her puppies while nursing. This is why vets deworm all puppies so early.
Kittens: A Threat from the Ground
Unlike puppies, kittens do not get hookworms from their mother’s milk. Their risk comes from the environment they live in. A clean litter box and keeping them indoors is the best way to protect them.
What to Watch For: Signs of Sickness
Young pets can get sick fast. If you see any of these signs, especially pale gums, call your veterinarian right away. Early detection saves lives.
Pale Gums
This is an emergency sign of blood loss. Healthy gums are pink; sick ones can look white.
Dark, Tarry Poop
This can mean there is bleeding in the intestines caused by the worms.
Not Growing Well
Poor weight gain, a pot-belly, and a rough-looking coat are common signs.
Weakness & Diarrhea
An infected pet might be tired, weak, and have ongoing diarrhea.
Why Vets Deworm Healthy-Looking Pups
This is so important! A puppy can be sick and dying from hookworms at 2 weeks old, but a poop test will still come back “negative.” This is because the worms are too young to lay eggs yet. This is why your vet follows a strict deworming schedule based on your puppy’s age, not just on a test result. It’s the only way to be safe.
Your Pet’s Protection Plan
Following your vet’s deworming schedule is the best way to protect your pet. Think of it as a series of battles: each dose kills a new wave of worms as they mature. This is why multiple doses are needed.
2 Weeks Old
First deworming. Targets the first worms from mom’s milk (puppies) or the environment (kittens).
4 Weeks Old
Second deworming. Kills the next wave of worms that have grown up since the last dose.
6 Weeks Old
Third deworming. Keeps eliminating worms and stops them from laying eggs.
8 Weeks Old
Final puppy/kitten deworming and time to start their first monthly, year-round parasite prevention.
Protecting Your Family
Hookworms from pets can also infect people. You don’t get them from petting your dog, but from contact with contaminated soil in your yard or a sandbox. The worm larvae can burrow into your skin and cause an intensely itchy rash.
How to Keep Everyone Safe:
- Always follow your vet’s advice for deworming and monthly prevention.
- Pick up pet poop from your yard daily. This is the most important step!
- Wear shoes and gloves when playing or gardening outside.
- Cover sandboxes so animals can’t use them as a litter box.
- Wash hands after playing with pets or being outdoors.