Giardia Infection In Bulldogs And French Bulldogs

By: Dr. Roy Kraemer |
DVM, Bulldog Specialist Veterinarian

Giardia infection in English bulldog puppies, French bulldog puppies, and American bulldogs, is caused by a tiny protozoan parasite that typically affects the intestines of pets and humans. This infection can lead to digestive issues, particularly diarrhea, in puppies and mature bulldogs alike.

The organism thrives in wet and contaminated environments, making it a common concern for pet owners. Given the breed-specific sensitivities of bulldogs, they may exhibit symptoms ranging from mild to severe, depending on factors such as

  • their age
  • immune system health
  • specific Giardia strain.
bulldog and french bulldog giardia

Giardia in Bulldog and French Bulldog INFECTION MODE:

Giardia has a robust capacity to survive in the environment for extended periods, posing a persistent risk to your pets.

The fecal-oral route and contaminated water sources are common modes of transmission for Giardia. This protozoan parasite is shed in the feces of infected animals. When another animal ingests cysts from contaminated feces or water, it can become infected.

This transmission can happen through:

  1. Direct ingestion of contaminated feces: This can occur when animals sniff, lick, or consume fecal matter from the ground, or when grooming themselves or others.
  2. Contaminated water: including drinking from puddles, lakes, rivers, or any standing water that may have been contaminated with feces from infected wildlife or domestic animals.

These transmission pathways underscore the importance of maintaining clean living environments for pets, as well as ensuring they have access to clean, fresh water

Fecal-oral route and containment water are common transmission modes of Giardia


High-risk groups for Giardia infection include:

  • Puppies: due to their immature immune systems and their non-discriminatory eating habits.
  • Weakened immune systems: make them less able to fend off infections.
  • Bulldogs are treated with immune-suppressant drugs: which can lower the body’s defenses against infections like giardia.
  • Chronically ill bulldogs: bulldog’s ongoing health issues can compromise the immune system and increase susceptibility to infections.
  • Chronic stress can weaken the immune response and make your bulldog more susceptible to infections.
  • Bulldogs with autoimmune diseases
  • Residents of densely populated settings where close quarters and shared resources can facilitate the rapid spread of Giardia organisms among the inhabitants.
    • animal shelters
    • breeding facilities,
    • kennels
    • batteries

Giardia Infection in Bulldogs / SYMPTOMS:

  • Diarrhea is most common and bloody at times.
  • Vomiting at times
  • Weight loss
  • Dehydration

Giardia Infection in Bulldogs / DIAGNOSIS:

  • Exam: history and clinical signs
  • Feal Test Microscopic
  • Fecal Antigen Test

Giardia Infection PREVENTION

Preventing Giardia involves a combination of maintaining a clean environment, careful management of food and water sources, and supporting the animal’s overall health and immune system. Here are some strategies to help prevent Giardia infection:

  • Clean Water: Always provide clean, fresh water for your pets. Change their water bowls frequently to prevent contamination.
  • Separate Food and Water Bowls in Communal Areas: In places like parks, kennels, or boarding facilities, use separate bowls for your pets to avoid sharing with others who might be infected.
  • Giardia Vaccine: Consult with your veterinarian about the Giardia vaccine. While it may not prevent infection entirely, it can reduce the risk of severe symptoms and lessen the shedding of Giardia cysts.
  • Avoid Drinking from Natural Water Sources: Prevent your pets from drinking water from springs, lakes, puddles, or any standing water, as these can be contaminated with Giardia cysts.
  • Avoid Stress: Minimize stress in your pet’s environment, as stress can weaken the immune system, making them more susceptible to infections like Giardia.
  • Immune Boosters and Nutritious Diet: Feed your pets a balanced, nutritious diet to support their overall health and immune system.
  • Immune Support, Multivitamins with Antioxidants, and Anti-Anxity  Supplements: Consider adding immune support supplements and multivitamins containing antioxidants  These can help bolster your pet’s immune system and improve their ability to fight off infections.
    • V4B Bully Immune Support
    • V4B Bully Multivitamin Formula
    • V4B Bully StressLess
    • V4B HEMP Relax & Calm

By implementing these preventive measures, you can significantly reduce the risk of Giardia infection 

V4B bulldog multivitamin plus Handout - French Bulldog

Giardia Infection in Bulldogs and French Bulldogs TREATMENT:

Infected bulldog puppies may not always show signs of illness, acting as asymptomatic carriers of diseases like giardiasis or with just periodic flare-ups. What might start as occasional diarrhea can evolve into a chronic disease.

This ongoing digestive distress can interfere with the proper processing and absorption of nutrients (malabsorption), leading to reduced appetite, significant weight loss, and even stunted growth in your bulldog puppy.

Treating giardia involves a combination of medication and environmental management. Here are the steps commonly recommended:


  • Fenbendazole (Panacur): A broad-spectrum antiparasitic medication that’s often the first choice for treating giardia. It’s usually administered over several days.
  • Metronidazole (Flagyl): This antibiotic and antiprotozoal medication is also effective against Giardia

It’s important to note that while these drugs are effective, the persistence of Giardia in the environment can lead to reinfection. Therefore, a single course of treatment might not be sufficient, and your veterinarian might recommend repeating the treatment or combining medications.


  • Disinfect Water and Food Bowls: Regularly clean your dog’s bowls with a solution of 1 part bleach to 16 parts water to kill Giardia cysts.
  • Dry the Environment: After cleaning, let the area dry thoroughly. Giardia cysts can be killed by drying out, so this step is crucial in the disinfection process.


  • Prevent Reinfection: To prevent reinfection, avoid areas known to be contaminated and discourage your dog from drinking from stagnant or suspect water sources.
  • Diet: For dogs experiencing diarrhea due to Giardia, feeding a bland, limited-ingredient diet can help. This should be easy to digest and help soothe their gastrointestinal system.
  • Probiotics and Supplements: Adding a probiotic supplement can support gut health, while botanical fibers can aid in digestion. Multivitamins with antioxidants may support the immune system, making your dog less susceptible to infections.
    • V4B Bully Probiotics KEEP UP

Bulldog Probiotics Bundle - Basic

Giardia Infection in People (Zoonosis) WARNING

Giardia is a zoonotic parasite, meaning it can be transmitted from animals to humans. Humans can also become infected by drinking contaminated water or through direct contact with infected animals, including their feces. This is why practicing good hygiene and sanitation is crucial for both pet owners and those who come into contact with animals.

Here are some key points to consider:

  1. Drinking Contaminated Water: Drinking water from untreated or contaminated sources, such as streams, rivers, or lakes, can put both humans and animals at risk of Giardia infection.
  2. Direct Contact with Infected Animals: Handling infected animals, particularly their feces, can also lead to transmission of the parasite. This includes cleaning up after pets, especially in areas where they defecate.
  3. Environmental Contamination: Giardia cysts can survive in the environment for extended periods, so it’s essential to be cautious in areas where animals may have defecated, such as parks, hiking trails, or camping grounds.

Practice good hygiene, including washing hands thoroughly with soap and water after handling animals or coming into contact with potentially contaminated areas.

giardia infection in bulldogs

Giardia Infection in Bulldogs and French Bulldogs Tips & Warning:

Below are selected Giardia tips and warnings, courtesy of Dr. Kraemer


Treating for giardia based on symptoms despite a negative test result is prudent because no single test is 100% reliable.


Use proper hygiene. Wear gloves and wash hands after handling infected pets or their feces


Remove your bulldog puppy’s feces and discard it as soon as possible to minimize contamination and reinfection.


If there are faces around the anus and tail, treat your bulldog puppy with an antiseptic shampoo, waterless antiseptic gel, spray or wipe

  • Bully Antiseptic XL Wipe
  • Bully Antispetic Spray
  • Bulldog Antiseptic Waterless Gel

Fr Bulldog Antiseptic Skin fold XL Wipe


Trim the hairs around the anal area


If you have other pets, have them also examined by your veterinarian.


Bring a fecal sample to your veterinarian to be tested at least once a year, even if your bulldog puppy appears healthy.


Negative stool test results for Giardia can be misleading due to the intermittent shedding of the organism in the feces. This intermittent shedding can result in false-negative results, especially if the sample is collected during a period when the parasite is not actively being shed.

In cases where a pet exhibits clinical signs consistent with Giardia infection despite initial negative test results, it’s advisable to repeat the test within a week. This helps increase the likelihood of detecting the parasite during a shedding period, improving the accuracy of the diagnosis.


Children and immunodeficient individuals (e.g., persons undergoing chemotherapy, HIV-positive individuals) are more susceptible to contracting giardia from your pets.


Do not let your Giardia-infected pet defecate or swim in public areas.

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The information provided on this platform is for general informational purposes only. It is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your veterinarian regarding any medical condition. It's important to always consider professional medical advice promptly and not to delay seeking it based on information you've read on this platform. Any reliance on the information provided here is entirely at your discretion.

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