Giardia in Dogs or Cats: Symptoms, Treatment and Aftercare

Giardia in dogs or cats: symptoms, treatment and the best aftercare

Giardia is one of the most common intestinal parasites in dogs and cats – and symptoms sometimes persist even after treatment. Why does this happen, and what is the best approach for full recovery?

What is Giardia?

Giardia is a single-celled intestinal parasite found in dogs, cats, and humans. It attaches to the small intestine lining, affecting nutrient absorption and digestion, often causing diarrhea.

It is especially common in environments with many animals, such as kennels, boarding facilities, or multi-pet households.

How does Giardia spread?

Infection occurs through contact with infected feces. The parasite is ingested via contaminated water, soil, or direct contact. Giardia forms cysts in the intestine that are shed in feces and can survive for months in the environment.

Symptoms

Persistent or recurring diarrhea
Foul-smelling, soft stool, sometimes with mucus or blood
Vomiting and nausea
Weight loss or reduced condition
Normal appetite may still be present

Diagnosis

Because shedding is irregular, a single fecal test may not be enough. Giardia One-step rapid tests are more reliable, and multiple tests are recommended.