Intestinal Parasites in Pets: Worms, Protozoa & Prevention
Intestinal parasites are extremely common in pets, especially puppies and kittens. Learn about the types, signs, and how to protect your pet.
Intestinal parasites — worms and single-celled organisms — are extremely common in dogs and cats. Puppies and kittens are especially vulnerable, and many are born with worms passed from their mother. While some parasites cause obvious symptoms, others can silently damage your pet's health. Regular deworming and fecal testing are essential.
Key Points
- Most puppies and kittens are born with intestinal parasites
- Common types: roundworms, hookworms, tapeworms, whipworms, Giardia
- Some parasites can spread to humans (zoonotic risk)
- Regular fecal testing catches parasites you can't see
- Monthly preventives can protect against many intestinal parasites
- Good hygiene reduces transmission risk
Common Types
Roundworms: the most common, spaghetti-like worms in stool. Hookworms: attach to the intestinal wall and cause bloody diarrhea and anemia. Tapeworms: flat, rice-grain segments seen around the anus or in stool. Whipworms: cause chronic diarrhea and weight loss. Giardia and Coccidia: microscopic protozoa that cause diarrhea.
How Pets Get Parasites
Puppies and kittens can be infected before birth (through the placenta) or through their mother's milk. Pets can also get parasites by swallowing eggs from contaminated soil, eating infected prey, grooming (tapeworms from fleas), or drinking contaminated water. Some parasites can penetrate the skin (hookworms).
Signs of Parasites
Visible worms in stool or vomit, diarrhea (sometimes bloody), vomiting, weight loss despite good appetite, pot-bellied appearance (especially in puppies), dull coat, scooting (dragging the bottom on the ground), and lethargy. Some pets show no signs at all — which is why regular testing is important.
Prevention and Treatment
Regular deworming: puppies and kittens should be dewormed every 2 weeks from 2 weeks of age until 12 weeks, then monthly until 6 months. Adult pets should have fecal testing annually. Many monthly heartworm preventives also protect against intestinal parasites. Keep the environment clean — pick up feces promptly and prevent scavenging.
When to See a Vet Immediately
- Visible worms in stool or vomit
- Diarrhea, especially with blood
- Vomiting with worms
- Pot-bellied appearance in a puppy or kitten
- Weight loss despite eating well
- Scooting or dragging the bottom
How RVC Can Help
RVC provides fecal testing, targeted deworming, and monthly parasite prevention. We can identify the specific parasite and choose the most effective treatment. Call +853 6677 6611.
This article is for educational purposes only and does not replace professional veterinary advice. If your pet is showing any symptoms, please contact Royal Veterinary Center immediately at +853 6677 6611.