What Causes Dogs to Have Diarrhea? Common Triggers

Diarrhea in dogs is when their poop is loose or watery. It’s something most dogs go through at some point, and figuring out what causes dogs to have diarrhea can help you fix it fast. This guide breaks it all down in a way that’s super easy to get. We’ll cover why it happens, what to look for, and how to help your dog.

Understanding Diarrhea in Dogs

Before we get into what causes dogs to have diarrhea, let’s talk about what diarrhea is. It’s when your dog’s poop is soft, runny, or comes out more often than usual. Sometimes it’s a one-time thing, but other times it keeps happening. Knowing the signs can help you figure out what causes dogs to have diarrhea and what to do next.

Common Symptoms Accompanying Diarrhea in Dogs

When your dog has diarrhea, you might notice other things too. These clues can help you understand what causes dogs to have diarrhea. Look out for:

  • Pooping more often
  • Runny or watery poop
  • Struggling to poop
  • Blood or slime in their poop
  • Acting tired or weak
  • Not wanting to eat
  • Throwing up
  • Getting dehydrated (dry mouth or sunken eyes)

If your dog has any of these along with diarrhea, call your vet to find out what causes dogs to have diarrhea in your pup.

Primary Causes of Diarrhea in Dogs

There are lots of reasons why dogs get diarrhea. Let’s go over the main ones so you can figure out what causes dogs to have diarrhea for your furry friend.

1. Eating Something Bad

One big reason for what causes dogs to have diarrhea is when they eat stuff they shouldn’t, like garbage, table scraps, or even grass. This is sometimes called “garbage gut.” Switching their food too fast can also upset their tummy.

  • Example: Giving your dog pizza or chocolate can make their poop runny.
  • Fix: Feed them good dog food and skip the human snacks.
ProblemWhat HappensWhat to Do
Eating bad stuffRunny poop, vomitingStop giving bad food, call vet

2. Food Allergies

Some dogs are allergic to foods like wheat, chicken, or dairy. This can be a reason for what causes dogs to have diarrhea. If they eat something their body doesn’t like, their tummy gets upset.

  • Signs: Itchy skin, ear problems, or diarrhea that won’t stop.
  • Fix: Ask your vet to help find out what food is causing it.

Check out more about dog allergies at the American Kennel Club.

3. Parasites

Little bugs like worms or Giardia can live in your dog’s tummy and cause diarrhea. This is a common answer to what causes dogs to have diarrhea, especially in puppies or dogs who play in dirty places.

  • How it happens: They eat or drink something with these bugs.
  • Signs: Losing weight, bloated belly, or seeingវ្ត

What Causes Dogs to Have Diarrhea: A Simple Guide for Pet Parents

Hey there, dog lovers! If your furry buddy is having tummy troubles, you’re probably wondering, what causes dogs to have diarrhea. Don’t worry, I’ve got you covered with this super simple guide that anyone can understand. We’ll talk about why dogs get diarrhea, how to spot it, what to do, and how to keep it from happening again. This is written for all you pet parents in the USA, with easy words, tables, and answers to common questions. Let’s dive in and help your pup feel better!

Understanding Diarrhea in Dogs

Before we get into what causes dogs to have diarrhea, let’s talk about what diarrhea is. It’s when your dog’s poop is soft, runny, or comes out more often than usual. Sometimes it’s a one-time thing, but other times it keeps happening. Knowing the signs can help you figure out what causes dogs to have diarrhea and what to do next.

Common Symptoms Accompanying Diarrhea in Dogs

When your dog has diarrhea, you might notice other things too. These clues can help you understand what causes dogs to have diarrhea. Look out for:

  • Pooping more often
  • Runny or watery poop
  • Struggling to poop
  • Blood or slime in their poop
  • Acting tired or weak
  • Not wanting to eat
  • Throwing up
  • Getting dehydrated (dry mouth or sunken eyes)

If your dog has any of these along with diarrhea, call your vet to find out what causes dogs to have diarrhea in your pup.

Primary Causes of Diarrhea in Dogs

There are lots of reasons why dogs get diarrhea. Let’s go over the main ones so you can figure out what causes dogs to have diarrhea for your furry friend.

1. Eating Something Bad

One big reason for what causes dogs to have diarrhea is when they eat stuff they shouldn’t, like garbage, table scraps, or even grass. This is sometimes called “garbage gut.” Switching their food too fast can also upset their tummy.

  • Example: Giving your dog pizza or chocolate can make their poop runny.
  • Fix: Feed them good dog food and skip the human snacks.
ProblemWhat HappensWhat to Do
Eating bad stuffRunny poop, vomitingStop giving bad food, call vet

2. Food Allergies

Some dogs are allergic to foods like wheat, chicken, or dairy. This can be a reason for what causes dogs to have diarrhea. If they eat something their body doesn’t like, their tummy gets upset.

  • Signs: Itchy skin, ear problems, or diarrhea that won’t stop.
  • Fix: Ask your vet to help find out what food is causing it.

Check out more about dog allergies at the American Kennel Club.

3. Parasites

Little bugs like worms or Giardia can live in your dog’s tummy and cause diarrhea. This is a common answer to what causes dogs to have diarrhea, especially in puppies or dogs who play in dirty places.

  • How it happens: They eat or drink something with these bugs.
  • Signs: Losing weight, bloated belly, or worms in poop.
  • Fix: Get a poop test at the vet and use deworming medicine.
ParasiteSignsFix
RoundwormsWorms in poop, diarrheaDeworming medicine
GiardiaRunny poop, weight lossVet medicine

4. Infections

Bacteria or viruses can make your dog sick and cause diarrhea. This is another reason for what causes dogs to have diarrhea. Some common ones are:

  • Parvovirus: A dangerous virus for unvaccinated dogs.
  • Salmonella: From eating raw or bad food.
  • Giardia: From drinking dirty water.
  • Fix: Your vet can give medicines to fight the infection.

5. Stress

Dogs can get diarrhea when they’re stressed or scared. Things like moving, loud noises (like fireworks), or being left alone can upset their tummy. This is a big reason for what causes dogs to have diarrhea during trips or boarding.

  • Fix: Keep things calm and ask your vet about calming treats.

6. Medicines or Poisons

Some medicines, like antibiotics, or harmful stuff like antifreeze or bad plants, can cause diarrhea. If your dog is on medicine and has diarrhea, talk to your vet about what causes dogs to have diarrhea in this case.

  • Fix: Stop the medicine or poison and call your vet right away.
CauseSignsFix
MedicinesSudden diarrheaTalk to vet
PoisonsVomiting, diarrheaEmergency vet visit

7. Health Problems

Sometimes, what causes dogs to have diarrhea is a bigger health issue. Things like:

  • Inflammatory Bowel Disease (IBD): The gut gets inflamed.
  • Pancreatitis: The pancreas gets swollen from fatty foods.
  • Liver or Kidney Issues: These organs don’t work right.
  • Cancer: Tumors in the tummy can cause diarrhea.
  • Fix: Your vet will do tests to find and treat the problem.

Why Does My Dog Have Acute vs. Chronic Diarrhea?

There are two types of diarrhea: acute (sudden and short) and chronic (keeps happening). Knowing the difference helps figure out what causes dogs to have diarrhea.

  • Acute Diarrhea: Comes on fast, maybe from eating bad food or stress. It usually goes away in a day or two.
  • Chronic Diarrhea: Lasts weeks or comes back a lot. It could be from allergies, worms, or health problems.

If diarrhea lasts more than two days or has blood, call your vet to check what causes dogs to have diarrhea.

How to Treat Diarrhea in Dogs

Once you know what causes dogs to have diarrhea, you can help your dog feel better. Here’s what to do:

1. Stop Food for a Bit

For short-term diarrhea, don’t give food for 12-24 hours, but keep giving water. Check with your vet first, especially for puppies.

2. Give Bland Food

After a break, feed small amounts of bland food like boiled chicken and rice. Slowly switch back to their normal food.

FoodHow to Make ItWhy It Helps
Chicken & RiceBoil plain chicken and white riceEasy on the tummy

3. Keep Them Hydrated

Diarrhea can make dogs lose water fast. Make sure they drink plenty of water. Your vet might suggest special drinks for hydration.

4. See the Vet

If diarrhea doesn’t stop, your vet can find what causes dogs to have diarrhea with tests like:

  • Poop tests for worms
  • Blood tests for health problems
  • X-rays to check the tummy

They might give medicines to stop diarrhea or treat infections.

Learn more about treating diarrhea at PetMD.

Preventing Diarrhea in Dogs

Stopping diarrhea before it starts is the best way to keep your dog happy. Here’s how to avoid what causes dogs to have diarrhea:

  • Feed good-quality dog food and don’t change it suddenly.
  • Take your dog to the vet for regular checkups and worm tests.
  • Keep trash, chemicals, and bad plants out of reach.
  • Keep your dog calm during stressful times like trips.
  • Make sure they’re vaccinated to avoid viruses.
Prevention TipWhy It Works
Good foodKeeps tummy healthy
Vet checkupsCatches problems early
No trash accessStops garbage gut

When to See a Veterinarian

Some diarrhea goes away on its own, but some needs a vet. Call your vet if:

  • Diarrhea lasts more than 2 days
  • There’s blood or black poop
  • Your dog is super tired or weak
  • They stop eating or drinking
  • They’re throwing up a lot

Your vet will figure out what causes dogs to have diarrhea and help your pup.

What Causes Dogs to Have Diarrhea Common Triggers
What Causes Dogs to Have Diarrhea? Common Triggers

Related Questions About Dog Diarrhea

Here are some common questions about what causes dogs to have diarrhea to help you out:

Why Does My Dog Get Diarrhea After Eating Certain Foods?

Some foods, like dairy or greasy snacks, can upset your dog’s tummy. This is a big reason for what causes dogs to have diarrhea. Stick to dog food and avoid human treats.

Can Stress Cause Diarrhea in Dogs?

Yup, stress from things like loud noises or new places can cause diarrhea. Keep your dog calm to avoid this cause of what causes dogs to have diarrhea.

How Do I Know If My Dog Has Worms?

Worms can cause diarrhea, weight loss, or worms in their poop. A vet can test their poop to find out if worms are what causes dogs to have diarrhea.

What Food Helps Diarrhea?

Bland foods like boiled chicken and rice are great for diarrhea. Feed small amounts and slowly go back to normal food.

Is Diarrhea an Emergency?

If your dog has blood in their poop, won’t eat, or looks really sick, it’s an emergency. Get to a vet fast to find what causes dogs to have diarrhea.

Conclusion

Figuring out what causes dogs to have diarrhea is the key to helping your pup feel better. Whether it’s bad food, worms, stress, or something else, you can take steps to fix it. Feed them good food, keep them calm, and take them to the vet regularly to keep diarrhea away. If your dog’s diarrhea doesn’t stop or looks bad, don’t wait—call your vet to get your furry friend back to wagging their tail!

For more pet health tips, check out ASPCA’s Animal Poison Control or AKC’s Health Section.

Author

  • Adarsh

    👋 Hi, I’m Adarsh, Writer & Founder of this blog with 10+ years of experience in pet care. 🐶 I work with Miko Pat, a trusted expert in dog and cat care, to share practical and reliable advice. 🐾 Together, we help pet parents raise happy, healthy furry companions every day!

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