Parasites in Dogs: What Pet Parents Need to Know
Parasites are more than just a nuisance—they can seriously impact your dog’s health and, in some cases, even pose risks to your family. At Willowbrook Veterinary Hospital, we’re here to help you recognize, prevent, and treat parasite issues before they become serious.
What Are Parasites in Dogs and How Do They Impact a Dog’s Health?
Parasites are organisms that live on or inside your dog and feed off their blood, tissues, or nutrients. Some cause mild irritation, while others can lead to serious illness, malnutrition, organ damage, or even death if left untreated.
How Do You Know If Your Dog Has Parasites?
Symptoms vary depending on the type of parasite, but common signs include:
- Diarrhea or vomiting
- Weight loss
- Scooting or licking the rear
- Coughing or breathing issues
- Itchy skin or visible pests on the coat
- General lethargy or poor coat condition
What’s the Difference Between External and Internal Parasites in Dogs?
External parasites live on your dog’s skin or coat. These include fleas, ticks, lice, and mites.
Internal parasites live inside your dog’s body, usually in the intestines, lungs, or heart. These include worms and microscopic organisms like Giardia and Coccidia.
Common Types of Parasites in Dogs
Intestinal Parasites:
- Roundworms: Common in puppies; can cause bloating and diarrhea.
- Hookworms: Feed on blood; may cause anemia and dark stool.
- Tapeworms: Often seen as small white segments near the anus or in poop.
- Whipworms: Affect the large intestine; cause diarrhea and weight loss.
- Coccidia & Giardia: Microscopic parasites that can cause persistent diarrhea.
- Spirochetes: Can lead to gastrointestinal and systemic illness.
External Parasites:
- Fleas: Cause intense itching and skin infections; can spread tapeworms and other diseases..
- Ticks: Spread diseases like Lyme disease; may go unnoticed until engorged.
- Mites: Cause mange, a skin condition marked by hair loss and scabbing.
- Lice: Less common but may cause itching and skin irritation.
What Are the Symptoms of Intestinal Parasites That May Be More Difficult to Notice?
Some internal parasites produce subtle or delayed signs, such as:
- Mild digestive upset
- Dull coat or poor growth (especially in puppies)
- Intermittent vomiting
- Occasional scooting or licking
- No visible signs at all—routine testing is key
How Will a Veterinarian Determine If My Dog Has Parasites?
We use a combination of:
- Fecal exams to detect eggs or parasites under a microscope
- Blood tests for parasites like heartworm or tick-borne diseases
- Skin scrapings or ear swabs for mites
- Regular wellness exams and annual screenings help catch problems early.
How Do You Treat Parasites in Dogs?
Treatment depends on the type of parasite:
- Deworming medications for intestinal parasites
- Topical or oral preventatives for fleas and ticks
- Antibiotics or antiparasitics for organisms like Giardia or heartworm
We customize treatment based on your dog’s age, health status, and parasite type.
Are There Any Risks Associated With Treatments for Parasites in Dogs?
Modern parasite treatments are generally very safe, but mild side effects—like temporary digestive upset or drowsiness—can occur. We’ll help you choose the right treatment for your dog and monitor for any adverse reactions.
Will I Be Able to See Parasites in Dog Poop?
Sometimes:
- Tapeworms may appear as rice-like segments.
- Roundworms look like spaghetti strands.
Most parasites (like Giardia or whipworms) are microscopic and require lab testing to detect.
What Parasites Cause Diarrhea in Dogs?
- Giardia
- Coccidia
- Hookworms
- Whipworms
- Roundworms
These parasites can cause anything from mild soft stool to severe, bloody diarrhea.
Can Humans Get Dog Parasites?
Yes—some dog parasites are zoonotic and can be transmitted to people, including:
- Roundworms
- Hookworms
- Giardia
- Fleas and ticks (which can carry other diseases)
Good hygiene, regular veterinary care, and parasite prevention are essential for protecting both pets and people.
Is There a Recommended Home Treatment for Intestinal Parasites in Dogs?
There are no proven home remedies that are as effective or safe as veterinary-prescribed medications. We strongly recommend consulting your veterinarian before trying any home treatment, as incorrect dosages or untested remedies can cause harm.
Worried Your Dog Might Have Parasites?
At Willowbrook Veterinary Hospital, we offer expert diagnosis, treatment, and year-round prevention for both internal and external parasites. Call us today to schedule a check-up or to discuss the best prevention plan for your pet.