Intestinal Parasites in Dogs and Cats: Signs and Prevention

Intestinal parasites in dogs and cats include roundworms, hookworms, whipworms, tapeworms, giardia, and coccidia. Signs can include diarrhea, weight loss, vomiting, pot belly, dull coat, or no signs at all. Stool testing and veterinary deworming plans are safer than guessing.

What symptoms or causes should I watch for?

• Roundworms: Common in puppies and kittens and may cause pot belly, vomiting, or poor growth.
• Hookworms: These can cause anemia, dark stool, weakness, and are especially risky for young animals.
• Tapeworms: Owners may see rice-like segments near the tail or bedding, often linked with fleas.
• Giardia and coccidia: These protozoal parasites can cause soft stool or watery diarrhea.
• Human exposure: Some parasites have zoonotic risk, so hygiene and cleanup matter.

What can I safely do at home right now?

• Bring stool for testing: A fecal test helps identify the parasite and treatment plan.
• Clean promptly: Pick up feces quickly and wash hands after handling litter or waste.
• Treat fleas: Tapeworm control often requires flea control too.
• Protect young pets: Puppies and kittens need scheduled parasite care.
• Avoid random dewormers: Different parasites require different medications and follow-up.

When is this an emergency?

Go to an emergency veterinary clinic now if you notice:

• Bloody diarrhea, black stool, severe weakness, or pale gums.
• Pot belly, poor growth, or dehydration in a puppy or kitten.
• Visible worms, repeated vomiting, or heavy flea infestation.
• Diarrhea in an immunocompromised household or with human exposure concerns.
• Weight loss, persistent diarrhea, or no improvement after prior treatment.

What will my veterinarian check?

Your veterinarian may run fecal flotation, antigen testing, or direct smear depending on the signs. Treatment depends on parasite type, age, species, weight, and reinfection risk.

How can I reduce the risk next time?

Use routine stool testing, flea control, sanitation, and veterinary parasite prevention.

Related veterinary guides

• Puppy First Vet Visit: What Should You Expect?
• Kitten First Vet Visit: What Should You Expect?
• Senior Dog Checkup: What Should Be Included?
• Senior Cat Checkup: What Should Be Included?

References

• Companion Animal Parasite Council - Guidelines
• Pets & Parasites - CAPC Pet Owner Resources
• AAHA/AVMA - Preventive Healthcare Guidelines for Dogs and Cats

Disclaimer: This article is for educational and informational purposes only. It does not constitute medical advice, does not establish a vet-client-patient relationship, and should not replace an in-person evaluation by a licensed veterinarian.