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Giardia in Dogs

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Giardia in Dogs

Posted by AdKitan AdKitan on
Updated at: September 07, 2020

Giardia in Dogs | Innovet Pet

It’s a common problem that affects many dogs, especially puppies – Giardia. This infection is not only uncomfortable for your dog but can spread as well to humans and other pets as well sometimes. Because of this, it’s important to ensure you help to eradicate this disease as soon as possible and take the right precautions to help prevent it from occurring. If you’re looking for how to get rid of Giardia in dogs, you’ll want to check out this article. Below you’ll find some helpful information you can use to help destroy this infection and keep your dog healthy.


1. What is Giardia?
2. What Does Giardia do to Your Dog’s Body?
3. Giardia in Puppies
4. Signs of Giardia in Puppies
5. Giardia in Puppies Treatment
6. What Causes Giardia?
7. What are the Symptoms of Giardia in Dogs?
8. How Long Does Giardia Last in Dogs?
9. How to Tell if Your Dog has Giardia
10. Giardia Treatments
11. Keeping Your Yard Free From Giardia
12. Caution Tips
13. How can Giardia Be Killed?

What is Giardia?

Giardia is an infection found in the intestines that’s most often caused by a bacteria called Protozoan Parasite Giardia. Canines can get Giardia when they are near, lick, or consume the feces of other dogs that contain this bacteria in them. Once in the body, the Giardia bacteria can form into cysts which can affect both the inside of your dog’s body and their skin. 

What Does Giardia do to Your Dog’s Body?

Giardia in dogs works to harm your dog’s health almost instantly. When your dog first gets Giardia, that bacteria will go into your dog’s small intestine. When it does, small cysts will start to form and appear in it. Because of this, it can be difficult to tell when a dog does have this infection. However, if not treated immediately, more visible signs will start to appear with your dog. This will come in the forms of cysts in their coat, diarrhea, and dehydration.

Giardia in Puppies

Giardia in puppies is much more concerning than in older dogs because their immune systems are still developing. This means they might not have sufficient antibodies to help fight off this infection. Because of this, the infection can be deadly for them or cause more severe side effects.

However, this isn’t to say that a puppy with Giardia has a fatal case. Ultimately, treating your puppy with Giardia successfully depends on whether or not it was caught quickly and treatment started soon afterward.

Signs of Giardia in Puppies

While Giardia symptoms are the same in puppies as in adults, there are a few extra ones to look for:

  • Bloated Stomach
  • Blood in the Stool
  • Indigestion

If you notice these symptoms or other signs of giardia in puppies not going away, be sure to call your veterinarian so they can check to see how to treat it.

Giardia in Puppies Treatment

Giardia can definitely be treated for puppies, but how well treatment goes depends on numerous things, such as your dog’s immune system. Your vet will more than likely want you to bring a stool sample in just to make sure Giardia is the problem. If the sample tests positive, puppies will be given the same medication as older dogs which are dewormers.

What Causes Giardia?

As mentioned above, Giardia is caused by a harmful bacteria that can be found in dog feces. This bacteria can spread in a few different ways, some of which are listed below.

Smelling/Being Near Other Dogs’ Feces

One of the main ways this infection is spread is through feces. If your dog enjoys going to the park or you send them to a kennel or daycare, they more than likely have a larger chance of catching this. This is because they will be around other dogs’ feces, and if they step, lick, or sniff an affected piece, they can quickly catch it.

Drinking Infected Water

If your dog shares a water bowl or likes to drink some water out of ponds or lakes, this is another common place that Giardia can hide. This is due to possible infected animals drinking out the same area which can then be passed to your dog.

Eating Grass or Chewing on a Stick that is Infected

Grass and sticks are another ways Giardia is often spread. If an affected dog or animal uses the bathroom in a certain patch of grass and your dog eats some grass blades near there, your pup can catch it. This also applies to sticks. If an affected dog or animal chews on a stick or it’s near an affected area and your dog touches that stick, Giardia could end up infecting them.

What are the Symptoms of Giardia in Dogs?

Giardia comes with a few symptoms. You can use these to help tell whether or not your dog might be suffering from this disease.

However, sometimes dogs oddly don’t show signs of Giardia if they have it. Because of this, you might not be able to tell if your dog has this disease because they aren’t showing any symptoms.

How Long Does Giardia Last in Dogs?

While it really depends on your dog and their health, Giardia typically can last anywhere from 5-12 days. So, it can heal somewhat quickly, but it needs to be addressed and faced head on to ensure that it can be treated within this timeframe.

How to Tell if Your Dog has Giardia

There are a few symptoms you can watch out for to tell if your dog has Giardia. Below are a few ways to help see if your dog does.

The Feces Has Mucus

While not a pleasant way to tell if your dog has this, it’s one of the best ways to find out. If you find that your dog’s feces is coated in mucus, this is usually a sign that they have Giardia. Sometimes the mucus will also come out with a green color which is a sign of infection.

Your Dog is Losing Weight

Another tell-tale sour Dog is Losing Weightign that your dog has Giardia is that they are losing weight. This is often caused by them not wanting to eat and instead are drinking water all the time.


If your dog is vomiting, it could be a sign of Giardia. The bacteria can cause queasiness which can cause your dog to vomit up any food they might have eaten.


Diarrhea is another major way to tell if your dog has Giardia. If your dog’s feces are not solid and instead coming out with a liquid, that might a sign you need to take them to the vet.


If your dog is drinking an incredible amount of water, but is still dehydrated, that could be a sign of Giardia. However, it won’t do to try to force your dog to drink water to help combat this. It’s important to ensure your dog is taken to vet if you find your dog is extremely dehydrated.

Their Coat Looks Bad

Because Giardia cysts can grow on the skin, they can destroy your dog’s beautiful coat. If you find that your dog’s coat is starting to fall out or looks patchy, it could be that Giardia is infecting them.

Giardia Treatments

If you do find that your dog has Giardia, you don’t have to worry. There are plenty of Giardia treatments you can use to help heal them.


Fenbendazole and Metronidazole are the main medications that your veterinarian will more than likely prescribe your pet. However, this could change depending on your dog’s needs and if they have other medical problems that might interact negatively with these two drugs.

Give Your Dog a Bath

A bath will not only help to soothe the skin but remove cysts that form on it. This way, infections won’t occur and you can quickly remove the bacteria from your dog.

Clean Up Feces

Giardia in Dogs | Innovet Pet

Because Giardia spreads in feces, it’s important to clean it up. You can do this with special equipment so you don’t need to get close to it or you can do it the old-fashioned way with a bag. If your dog does have Giardia, make sure to immediately pick up the feces and quickly dispose of it so it doesn’t spread. Be sure to watch your dog when they are around other dogs to ensure they don’t sniff or lick their feces.

Don’t Go in Moist or Cool Environments

Moist and cool environments are where this bacteria loves to hide. If you want to make sure your dog is safe from this harmful bacteria, try to make sure they don’t go in these type of environments. Giardia can survive for up to a week and rapidly reproduce during this time. Because of this, it’s important to avoid these environments as they more than likely contain this bacteria.

Get Yearly Exams

One of the best ways to help prevent your dog from getting Giardia is to make sure they get yearly exams. You can bring in a stool sample to your vet so they can run tests and make sure your dog isn’t infected.

Bathe Your Dog

It’s often unavoidable to fully prevent a dog from sniffing or playing in possibly affected areas. However, you can help to prevent the bacteria from spreading in the body by giving your dog a bath. This way, the bacteria can be washed off and won’t linger around on their body where it could cause major problems down the road.

If you do find your dog has Giardia, it’s never too late to give them a bath. In fact, it’s often recommended you often do so. This can help to remove any bacteria on the skin as well as destroy cysts that might be in their coat.

Clean Off Their Toys and Household Items

Cleaning off your dog’s toys and other household items they use is a great way to help prevent Giardia. To fully disinfect them, you can wash them off with hot water and soap. You can also soak them in vinegar and baking soda to help destroy any germs on them.

Always Make Sure to Give Them Clean Water

It’s always important to give your dog clean water, but even more so to help prevent them from getting Giardia. Always make sure to give them clean water for their meals and throughout the day. You can help to better prevent Giardia by giving them filtered water or boiling water and letting it cool down before giving it to them.

Besides giving them clean water, make sure to also clean their water bowl out every day. This will not only help to keep it clean, but prevent the buildup of bacteria that could harm your dog’s health. In fact, it’s believed that water is the number one source of how Giardia is spread. So, you’ll want to make sure your dog only drinks filtered water out of a clean bowl.

Keeping Your Yard Free From Giardia

Dogs mainly spend most of their time outdoors in the area they live. While you might think this space is safe, it doesn’t mean Giardia doesn’t dwell here. Below are some ways you can keep your yard free from Giardia.

Make Sure to Clean Up the Feces

It can be easy to let feces sit in the yard for a few days before cleaning them up. However, when Giardia is involved, it’s extremely important to clean it up immediately. This will help to prevent it from spreading and from other dogs and animals you might have from getting the infection.

Bleach Driveways and Sidewalks

One way to ensure your dog doesn’t get this infection is by bleaching your driveway and sidewalks. Bleach will instantly destroy any bacteria on these surfaces so it doesn’t spread and possibly infect your dog.

Caution Tips

Watch Your Dog in the Summer Near Water

It’s especially important to be careful in bodies of water, like streams during the summer. Summer weather can create humidity, something which Giardia bacteria loves.

Avoid Mud

Muddy water can be a harbor for this bacteria, especially when it’s near a body of water which can encourage extreme growth. It’s important to ensure your dog doesn’t spend much time in the mud to help prevent them from catching this infection.

Be Careful When Treating Your Dog

While it’s often rare for humans to catch Giardia from dogs, it’s not unheard of. If your dog has Giardia and licks your face, the bacteria can be transmitted into your body. It’s a good idea to avoid having your dog lick you or immediately wipe off any saliva they might have passed on to you.

Keep an Eye on Your Dog With Medicine

It’s important to keep an eye on your dog to ensure that the medicine prescribed is working for them. Sometimes the drugs can have bad effects, like severe vomiting or diarrhea. If you find that your dog is having even worse symptoms than before, make sure to immediately contact your vet to find a different solution.

How can Giardia Be Killed?

With Cold Temperatures

It can be difficult to destroy Giardia germs entirely without the use of medicine. However, sometimes cold weather can help to kill off the germs because their breeding ground is destroyed. This means in the winter Giardia isn’t as evident which offers your dog more protection from this problem.

With Medicine

Giardia can also be killed with the use of fenbendazole and metronidazole. These medicines work to help destroy the bacteria and ensure it doesn’t grow or spread.


This medicine is used to help kill off many different types of gastrointestinal problems, like Giardia and roundworm. The correct dosage amount will depend on the weight and age of your dog, so it’s important to check with your veterinarian how much to give your pet.

This drug usually comes in a liquid form. This can help to make giving it to your pet a bit easier than with a pill. You can mix it up with moist dog food to ensure they get the full dose.


This drug can help to treat anaerobic bacterial infections by destroying the bacteria’s DNA so they can’t reproduce. It can help to keep the immune system strong and move things through the intestines so the bacteria leaves them. Metronidazole is also anti-inflammatory so it can help to calm inflamed areas in your dog’s body to provide relief. However, this drug can cause an upset stomach in dogs. Because of this, it’s important to make sure they eat something before taking this antibiotic.

These two drugs are the main ways to help treatment Giardia, although your vet might prescribe a different dewormer based on your dog’s medical history and needs. Sometimes vets might even combine these two medicines together to help fully combat the problems this bacteria causes.

If your dog has Giardia, you don’t need to worry, it’s treatable. However, you need to immediately take them to your vet and be careful when treating them because it can spread to humans. By keeping the information above in mind, you can be sure that your pup will be able to heal from the disease and get back to their normal, playful self.


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Overview of Giardiasis
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Overview of Giardiasis

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