Can Dewormer Cause Blood In Stool?

correct answerThe Short Answer is:

Remember that blood in their stool should only appear one to two days after they take the dewormer. The most important thing to do is to get your dog to the veterinarian as soon as possible if they still show blood after days or if there is a large amount of blood present.

In this research you will know the answer to the query “Can Dewormer Cause Blood In Stool?“. Does Dewormer cause blood in stool?

Pets are our friends and we want to make sure they are taken care of the best way we can. 

We their protectors must make sure they are taken care of when they get sick. 

Worms are among the most common things our dogs might get. 

Worst of all even after we administer the medication to treat the worms we might notice blood in their stools! 

Our first reaction may be to rush them to the nearest emergency veterinarian to make sure everything is okay. 

Lets take a deeper look at the entire process of worms treatment and what bloody stool might mean before we move forward. 

Why and how do puppies/dogs get worms?

We often do not realize how easy it is for our dogs to catch worms. Some puppies are born with them or get them from their mothers through their milk. 

Worms may have you wondering what exactly are they? We can not possibly have earthworms in our dogs since they are used for fishing right? 

We are actually talking about parasitic worms which are invisible to humans. 

Our dogs are likely to encounter parasitic worms such as roundworms hookworms tapeworms whipworms and coccidia. 

In addition to eating their hosts’ blood and nutrients these worms live inside other organisms. 

In addition to infecting dogs many worms can also infect humans. 

What are these parasitic worms doing in our hairy best friends? 

Worms are most commonly transmitted to dogs through the soil. 

Animals that are infected with worms often excrete larvae of the worms in their feces when they defecate. 

As the feces mix with the soil an unsuspecting dog may swallow some of the soil or dust that contains the worms and become infected.

Animal carcasses or animals may be stumbled upon by dogs in the same way. 

Dogs are unable to use their hands so their mouths are often used for exploring. 

Dogs can become infected with worms if they eat small animals or parts of animals that contain worms. 

Dogs can also get worms from fleas which is a third common method. 

A flea often serves as a host for worms and a flea that sets up shop on a dog often transmits the worm infection it carries. 

What are the signs that your puppy/dog has worms?

Infected dogs and puppies may show a few signs that indicate they have worms. 

This is because the worms feed on the dogs blood and other nutrients in its diet. This prevents your dog from absorbing those nutrients and can often make them weak because of blood loss. 

A dog showing suddenly increased fatigue is one of the most common symptoms of worm infection. 

Rather than being playful and full of life before they will become very tired very quickly.  

Diarrhea that never goes away is common for dogs that are infected with worms. 

In addition they may suffer rapid weight loss and abnormal fur color as a result of not receiving the nutrients they require. 

How do dewormers work with dogs?

Due to the variety of worms that your dog can be infected with dewormers work in different ways. 

In most cases dewormers work by killing the parasite which will then pass through your dogs digestive system breaking it down into small pieces.

There are some worms that are more resilient so they do not go so easily down. 

The problem with these more resistant worms such as tapeworms and hookworms is that any medicine strong enough to kill them may harm your dog. 

Thus instead of temporarily paralyzing them the dewormer medicine temporarily paralyzes them. 

The paralyzed animals can then be passed through the digestive tract by your dogs body and into its feces once they are dislodged.  

It is amazing that some hookworms and roundworms can be seen by the human eye so you might notice them moving around in your dogs poop after the paralyzing effect wears off.  You should not panic if this happens because that means they’re not living inside your dog anymore. 

How often should puppies/dogs be dewormed?

If you’re concerned about how often your puppy or dog should be dewormed its highly recommended you talk to your veterinarian. 

Based on the age size and type of worms infected with the dog a number of factors are taken into account.  

Until they are six months old puppies should be dewormed every two to three weeks. 

As a preventative measure every three months is best after six months of deworming. 

If your dog is pregnant your veterinarian is likely not to recommend deworming medicine. 

Instead they choose to wait until puppies are born and then give everyone a dewormer. 

Can Dewormer Cause Blood in Stool?

What might be causing dewormers to leave blood in your dogs stool is the topic of the first part of this article. 

Our discussion about the dewormer already mentioned it earlier as it kills worms. 

Your dogs blood has been feeding those worms and their bodies are full of their blood. 

As soon as that worms body enters your dogs digestive tract the blood will not be reabsorbed.  

As a result any blood from the worm will end up in your dogs feces. 

Should you visit a vet if this happens?

Although seeing blood in your dogs feces can be alarming knowing the reason for it is that the dewormer is doing its job will put your mind at ease. 

Keep a log of how often you see excess blood in your dog according to most veterinarians. The least you can do is call your vet to let them know you are worried so they will have it on file. 

Its also important to remember that the dewormer should not cause blood in their stool for two to three days after they take it. 

You need to take your dog to the vet as soon as possible if they continue to show blood for days or if there is a large amount of blood. 

What are the other side effects of deworming your dog?

The deworming medicine may cause your dog to experience some negative side effects. 

Due to the fact that the medication is administered orally most people who take it vomit up the medication shortly after taking it. The drug may also cause nausea lack of appetite and diarrhea. 

How long do these side effects last?

Your dog should not experience any side effects for more than 24 hours after receiving the deworming medication. After that you should take the animal to the veterinarian. 

Are there any effective home remedies for deworming dogs?

You can find several articles online that discuss home remedies for deworming your dog or puppy. 

In most cases pumpkin seeds carrots dried coconut apple cider vinegar and chamomile are given to them as treats.  

However dog owners need to be aware of something very important. 

You’ll almost always find in these articles that these are methods you can “try.” 

Methods such as these do not work and are not considered by veterinarians to be effective in deworming dogs. 


In conclusion we now have a better understanding of parasitic worms that can affect our pets. 

The purpose of these worms is to feed on their flesh depriving them of the nutrients their bodies need. 

Our dogs can also contract worms in the places they are most likely to get them. 

By knowing where they have been exposed we can try to avoid them or be more aware of their presence. 

There is now more knowledge about how dewormers work what side effects we might experience and why we should not be alarmed if blood is found in their stool within a day or two after they have taken the dewormers. 

I am a dog lover so I find this all to be excellent information for taking care of them and making sure they live a long healthy life. 

If you want to read more about dogs’ health tips read here: Dog Health Tips and Tricks.

Can Dewormer Cause Blood In Stool? (Watch Video)

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