dog mit diarrhoea

Diarrhea in Dogs: Causes, Symptoms, and Treatment

Table of Contents

1. What is Diarrhea in Dogs?

Diarrhea in dogs is a common symptom that can be triggered by a variety of factors. It refers to liquid to watery stools, often occurring in larger quantities and with increased frequency. While a single episode of diarrhea is often harmless, recurring or prolonged diarrhea in dogs should be investigated more closely.

2. Common Causes of Diarrhea in Dogs

There are many possible causes when your dog has diarrhea, including:

  • Diet change in dogs: Sudden changes in diet can lead to a dog developing diarrhea.
  • Food intolerances: Some dogs are sensitive to certain foods or additives.
  • Infections: Bacterial or viral infections can also lead to diarrhea in dogs.
  • Parasites: Worms or giardia are common triggers of diarrhea.
  • Stress: Changes in daily routine, travel, or new environments can stress a dog with diarrhea.
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3. Symptoms in a Dog with Diarrhea

A dog with diarrhea often shows additional symptoms, including:

  • Vomiting
  • Loss of appetite
  • Fatigue or lethargy
  • Fever
  • Blood or mucus in the stool

If these symptoms occur in addition to diarrhea in your dog, it is advisable to consult a veterinarian.

 

4. How do I treat diarrhea in my dog?

Mild cases of diarrhea in dogs can often be treated with home remedies:

  • Fasting: Let the dog fast for 12-24 hours so that the stomach can settle.
  • Bland diet: After fasting, feed a bland diet such as boiled chicken and rice. Alternatively, high-quality proteins such as insect protein or other alternative proteins like fermented bacteria can be helpful to stabilize digestion. These are easily digestible and help to relieve the gut.
  • Pre- and Probiotics: To strengthen the gut flora, prebiotics and probiotics can help. These support healthy gut flora and can accelerate recovery after diarrhea.
  • Water intake: Make sure your dog drinks enough to avoid dehydration.

However, for prolonged or severe diarrhea in your dog, you should seek professional help.

 

5. Chronic Diarrhea in Dogs

If your dog regularly has diarrhea, this is referred to as chronic diarrhea in dogs. Unlike acute diarrhea, which often subsides within a few days, chronic diarrhea lasts for a longer period – usually longer than two to three weeks – or keeps recurring. This is a sign that your dog's body is reacting to persistent irritation or a disorder.

Causes of chronic diarrhea in dogs

The causes of persistent diarrhea in dogs are diverse. Often, there is an underlying problem in the digestive system or metabolism:

  • Food intolerances or allergies: Many dogs are sensitive to certain protein sources, grains, or additives in their food.
  • Chronic enteritis (IBD – IBD / Inflammatory Bowel Disease): An autoimmune reaction in which the immune system attacks the intestinal lining and causes inflammation.
  • Parasites or bacterial infections: Recurrent infections with giardia or other intestinal parasites can lead to prolonged diarrhea.
  • Organic causes: Diseases of the pancreas, liver, or kidneys can disrupt digestion and trigger symptoms such as diarrhea.
  • Stress or hormonal disorders: Psychological stress or hormonal imbalances, for example with thyroid diseases, also affect gut health.

How to recognize chronic diarrhea in dogs

A chronically ill dog with digestive problems usually shows not only diarrhea but also other accompanying symptoms:

  • Alternating soft and watery stools for weeks
  • Flatulence, abdominal noises, or recurrent vomiting
  • Loss of appetite and weight loss
  • Lethargy or dull coat

If you observe such symptoms for a longer period, you should definitely consult a veterinarian. Only a targeted examination – including stool analysis, blood count, and possibly ultrasound – can determine the exact cause.

Elimination diet for chronic diarrhea

An elimination diet is a proven method to find out if a food intolerance in dogs is the cause. Your dog is fed exclusively with a single, previously unknown protein source – for example, insect protein or vegan – and a suitable carbohydrate source for 6-8 weeks. Afterwards, other ingredients are gradually added to observe the body's reaction.

During the elimination diet, it is important to be consistent: no treats, chews, or table scraps. This is the only way to reliably determine whether the previous food caused the diarrhea in your dog.

Tip: For sensitive dogs, it can help to additionally support digestion with prebiotics and probiotics. Products such as BugBell BellyVital contain natural ingredients like psyllium husks, blueberries, and Bacillus velezensis, which can stabilize the intestinal environment and counteract inflammation.


Long-term support for sensitive dogs

If your dog is prone to chronic diarrhea, a permanently stomach-friendly diet is crucial. Focus on:

  • high-quality, easily digestible protein sources (e.g., insect protein, horse, or salmon)
  • fiber from pumpkin, psyllium husks, or sweet potato
  • anti-inflammatory ingredients like turmeric or milk thistle seeds
  • an adjusted feeding routine with several small meals per day

This way, you can stabilize digestion long-term and prevent relapses.

 

6. Diarrhea in Puppies

Diarrhea in puppies is particularly serious, as young dogs can quickly become dehydrated due to their immature immune system and smaller fluid reserves. Even mild diarrhea can become dangerous within a few hours if the puppy loses too much fluid and electrolytes.

Causes of diarrhea in puppies

The causes of diarrhea in puppies sometimes differ from those in adult dogs. Common triggers include:

  • Diet change: When switching from mother's milk to puppy food or changing brands, the sensitive puppy stomach often reacts with diarrhea.
  • Parasites: Giardia, roundworms, or coccidia are typical pathogens in young dogs and often lead to watery stools.
  • Infections: Viruses (e.g., parvovirus) or bacteria can cause severe gastrointestinal infections in puppies.
  • Stress: A new environment, separation from the mother, or transport to a new home can strain the intestines and temporarily lead to diarrhea.
  • Unsuitable food or treats: Foods that are too fatty or heavily spiced are unsuitable for puppies and quickly lead to digestive problems.

Symptoms in puppies with diarrhea

In addition to the typical watery or mushy stool, other symptoms may occur in a puppy with diarrhea:

  • Loss of appetite or refusal to drink
  • Vomiting or abdominal noises
  • Lethargy and weakness
  • Blood or mucus in the stool
  • Rapid weight loss

Since diarrhea in puppies can quickly become dangerous, the rule is: better to go to the vet too early than too late.

Caution: If your puppy has diarrhea for longer than 12 hours, is vomiting, or appears lethargic, you should consult a veterinarian immediately. Dehydration can be life-threatening.

First aid for diarrhea in puppies

If your puppy has diarrhea, you can carefully stabilize him as long as he otherwise seems fit:

  • Water and electrolyte solution: Make sure your puppy drinks regularly. You can offer him lukewarm water or a diluted electrolyte solution.
  • Bland diet: After consulting with the vet, you can give easily digestible food – e.g., boiled chicken and rice or special puppy bland food. Insect protein is also very suitable as it is particularly easy to digest and rarely causes allergies.
  • Warmth: Keep the puppy warm, as diarrhea and dehydration can weaken the circulatory system.
  • Quiet environment: Avoid stress and excitement until digestion stabilizes.

When is diarrhea in puppies dangerous?

In puppies, the line between harmless and dangerous is often very thin. If you notice any of the following signs, seek veterinary help immediately:

  • persistent or bloody diarrhea
  • loss of drinking behavior
  • high fever or trembling
  • persistent vomiting
  • severely sunken eyes (sign of dehydration)

Prevention: Healthy gut flora from the start

Stable digestion is the basis for a strong immune system. Support your puppy's gut health early on with easily digestible food and natural prebiotics.

 

7. When should I take my dog with diarrhea to the vet?

If your dog has diarrhea that lasts longer than 24 hours, or if accompanying symptoms such as fever, blood in the stool, or vomiting occur, a visit to the veterinarian is essential. Special caution should also be exercised with puppies and older dogs, as they are more susceptible to dehydration.

8. Product recommendation for dogs with diarrhea: BugBell BellyVital

To support your dog's digestion and prevent digestive problems, supplements such as the BugBell BellyVital product range are ideal. These supplements contain a combination of natural ingredients that promote gut health and reduce the risk of diarrhea in dogs.

Psyllium husks and insect protein support the gut flora and regulate digestion. Pumpkin provides fiber that helps normalize stool, while blueberries and turmeric have antioxidant properties and can counteract inflammation.

  • Pumpkin for dogs: Pumpkin is rich in fiber and supports healthy digestion.
  • Blueberry for dogs: Blueberries offer antioxidants that strengthen the immune system.
  • Coconut oil for dogs: Coconut oil provides healthy fatty acids that nourish skin and coat.
  • Psyllium husks for dogs: Promote intestinal movement and regulate stool.
  • Turmeric for dogs: Has anti-inflammatory properties and supports joint health.
  • Milk thistle seeds for dogs: Promotes liver health and detoxifies.
  • Dandelion for dogs: Supports digestion and is rich in vitamins.
  • ß-Glucans for dogs: Strengthen the immune system.
  • Fructo-Oligo-Saccharides (FOS) for dogs: Prebiotics to promote healthy gut bacteria.
  • Mannan-Oligosaccharides (MOS) for dogs: Promote healthy gut flora.
  • Bacillus velezensis for dogs: Stabilizes the gut flora.
  • Enterococcus faecium for dogs: Probiotic to support digestion and the immune system.

Regular feeding of supplements such as BellyVital can help support your dog's gut health long-term and prevent digestive problems.

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Note: This article does not replace veterinary advice. Our products can provide nutritional support but are not veterinary medicinal products. If your dog has health problems, please always consult a veterinarian.

Portrait of Jamina Zaugg

Reviewed and approved by

Jamina Zaugg, M.Sc.

Food Scientist at BugBell

Jamina is a food scientist specializing in functional pet food formulations, alternative protein sources, and digestible feeding. At BugBell, she is responsible for product development, formulation validation, and transparent, open declaration of all ingredients.

Degree: M.Sc. Food Science (Osnabrück University of Applied Sciences)

Expertise: Nutritional physiology, alternative proteins, formulation and labeling law (EU)

Conflicts of interest: works for BugBell (product-related content may mention own products)