When it comes to our dogs’ health, we do our best to protect them from what we see. However, some threats are invisible dangers that cause real pain and damage. One of these is Giardia in dogs.
The parasite is more common than most people think. Giardiasis a serious condition that causes extreme discomfort for dogs and can be dangerous for puppies and senior dogs. When left untreated, the situation can get out of hand.
In this guide, we’re going to share everything there is to know about Giardia in dogs, from what it is to how it’s prevented.
What Is Giardia in Dogs?
Giardia is a microscopic protozoan that infects a dog’s intestines, causing a condition known as giardiasis. Unlike worms, which are larger and often visible in a dog's stool, Giardia is too small to see without a microscope.
This parasite exists in two forms:
Trophozoites. These live in the intestines and feed on nutrients, multiplying rapidly.
Cysts. These infectious trophozoites are shed in the dog's feces. They can survive in the environment for weeks to months.
When the parasites enter the dog’s body, they attach to the intestinal walls and start reproducing. From here, they can cause several digestive issues.
Giardiasis is a widespread condition that can affect dogs of all ages. Puppies, seniors, and dogs with compromised immune systems are vulnerable.
What Are the Symptoms of Giardia in Dogs?
The symptoms of Giardia in dogs include general signs and gastrointestinal distress.
Diarrhea. The most common symptom of this disease in dogs is diarrhea. Canine diarrhea resulting from giardiasis often has a soft, watery, or greasy consistency. It may also contain mucus. The stool may also have an unusually strong, foul odor.
Weight Loss. Because Giardia interferes with nutrient absorption, infected dogs may experience gradual weight loss despite eating normally. This is a major concern in puppies because they need proper nutrition for growth and development.
Vomiting. Some dogs may experience occasional vomiting, though this is less common than diarrhea. When it occurs, nausea, lip-smacking, or drooling may accompany the condition.
Dehydration. Frequent diarrhea can almost always lead to dehydration, particularly in puppies, old dogs, or dogs with weaker immune systems. The common indicators of dehydration include dry gums, excessive panting, and loss of skin elasticity.
Lethargy. Dogs with giardiasis may become less active and more tired than usual. Dehydration, nutrient loss, or the body's immune response to the Giardia infection can cause lethargy.
Abdominal Discomfort. Some dogs may exhibit signs of stomach pain or discomfort. This can be seen as whining, restlessness, or a hunched posture. Dogs can also experience bloating and gas.
Poor Coat Quality. Chronic giardiasis can cause a dull, rough, or thinning coat. This happens because of malnutrition and poor health.
How Does a Dog Get Giardia?
Dogs get the parasite mainly through contaminated water, stool, environments, and fur.
Drinking Contaminated Water
When dogs drink water from stagnant sources such as puddles and streams, they’re at risk of contracting Giardia and other parasites. The cysts enter the dog’s digestive system. Once inside, they can multiply and cause infection.
Ingesting Infected Stool
Dogs may also get infected with Giardia by ingesting the stool from an infected animal. This can happen when they sniff, lick, or eat the feces while exploring outdoors.
Contact With Contaminated Environments
Areas such as unhygienic kennels, shelters, and dog parks may harbor Giardia cysts left behind on soil, grass, and other surfaces. When dogs walk, play, or sniff these areas, they may pick up the parasites on their paws, fur, and mouth.
Self-Grooming
When the Giardia cysts are present on the body after contact with contaminated water, soil, feces, or environments, a dog can get infected when it grooms itself.
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