What is Diarrhea and Why Does it Happen?

No pet parent out there can say they haven’t had to deal with the occasional dog diarrhea and the tremendous stress that comes with it. Diarrhea in dogs can be quite distressing, both for your furry friend and for you as a pet parent. It's characterized by the frequent passage of loose or watery stools and can be triggered by various factors. Essentially, it's the body's way of purging toxins, pathogens, or indigestible substances. Given their curiosity, dogs often eat things they shouldn’t, such as spoiled food or foreign objects, which can upset their digestive system. While a brief episode of diarrhea can be a natural defense mechanism, prolonged or severe diarrhea indicates a deeper health issue that needs attention.

 

Diarrhea can be broadly classified into two types:

1. Acute Diarrhea: This type comes on suddenly and can last from one day to two weeks. It’s often caused by dietary indiscretions or infections.

2. Chronic Diarrhea: This type is more persistent, lasting over three weeks, and often indicates a more serious health issue that doesn't respond to standard treatments.

 

Normal Digestion and Diarrhea

To understand diarrhea, it's helpful to first understand how normal digestion works in dogs. In a healthy digestive process, food travels through the small intestine, which is where most nutrients are absorbed. The inner lining of the small intestine has tiny, finger-like projections called villi. These villi increase the surface area, making nutrient absorption more efficient and controlled.

 

When a dog has diarrhea, this orderly process is disrupted. Irritation or infection in the small intestine can hinder its ability to absorb nutrients and water properly. Instead of being absorbed, these nutrients and water pass rapidly through to the large intestine. The large intestine normally absorbs water and electrolytes, turning the digested food into solid waste. However, when it suddenly receives a large volume of fluid from the small intestine, it can't absorb all the excess water. This results in loose or watery stools.

 

Additionally, diarrhea speeds up the transit time of food through the digestive system. This rapid movement prevents the gut bacteria from fermenting the food properly, which can lead to further digestive upset and more frequent, watery bowel movements. This combination of factors makes diarrhea a challenging condition to manage, as it involves both immediate and secondary effects on your dog’s digestive health.

 

Common Causes of Diarrhea in Dogs

1. Bacterial Infections: Bacteria such as Salmonella, Campylobacter, Clostridium, and pathogenic strains of E. coli can cause diarrhea in dogs. Generally, a healthy dog’s immune system can handle these pathogens. However, when the immune system is compromised or the bacterial load is too high, diarrhea can result.

 

2. Toxins: When toxins enter your dog’s body, their system reacts quickly to get rid of them, often resulting in diarrhea. This is the body’s way of flushing out harmful substances before they can cause more damage. However, if your dog isn’t getting enough essential nutrients, these toxins can do even more harm.

 

Here's why: minerals in your dog's body have specific "receptor seats" they occupy to keep everything running smoothly. If your dog is deficient in certain minerals, harmful substances like heavy metals can take these seats instead. For example, if your dog lacks calcium, toxic metals like lead can occupy the calcium receptors, causing health issues.

 

To combat this, it’s crucial to ensure your dog’s diet is rich in necessary minerals. Regular detoxification and supplementing their diet with the right minerals can help prevent these toxic substances from taking hold and causing problems. By keeping their nutrient levels balanced, you can support your dog’s natural ability to detoxify and maintain overall health.

 

3. Food Allergies: Food allergies are another common cause of diarrhea. They occur when the immune system overreacts to certain proteins found in processed foods. Feeding your dog a nutrient-rich, natural diet can help reduce these allergic responses and support overall gut health.

 

4. Vaccines: While vaccines are crucial for preventing serious diseases, over-vaccination can stress your dog’s immune system and lead to side effects like diarrhea. It’s important to follow a balanced vaccination schedule and consult with your vet about the necessity of boosters and combination vaccines.

 

 

5. Parasites: Parasites such as roundworms, hookworms, whipworms, giardia, coccidia, and tapeworms are frequent culprits behind diarrhea. Regular parasite screenings and targeted treatments are essential to maintain your dog’s digestive health.

 

6. Deficient Diet: A diet lacking essential nutrients can significantly weaken your dog’s digestive system. Many commercial dog foods are heavily processed and may not provide all the necessary vitamins and minerals your dog needs to maintain optimal health. Over time, this lack of essential nutrients can impair the digestive tract’s ability to process and absorb food effectively, leading to diarrhea and other digestive issues.

 

To support your dog's digestive health, it's vital to provide a balanced, nutrient-rich diet. This can be achieved by feeding your dog a variety of whole foods, including high-quality proteins, vegetables, and fruits, along with supplements as needed. A non-processed, raw, or cooked diet is often recommended because it is closer to what dogs would naturally eat in the wild and can help ensure they get the full range of nutrients required for a healthy digestive system.

 

By paying close attention to your dog's diet and ensuring they receive all the necessary nutrients, you can help prevent digestive problems and promote a healthier, happier life for your furry friend.

 

7. Dietary Changes: Sudden changes in diet or consuming unfamiliar foods can lead to diarrhea. Even dogs on a consistent diet of processed kibble can become sensitive to new foods or develop food intolerances.

 

8. Eating Garbage: Dogs often ingest inappropriate items like rich food, spoiled food, or inedible objects, which can irritate their gut lining and cause gastritis, particularly in dogs with sensitive stomachs.

 

9. Stress-Induced Diarrhea: Changes in the environment or routine, such as moving to a new home or a change in family dynamics, can trigger stress diarrhea in dogs.

 

10. Inflammatory Diseases: Conditions like colitis or Inflammatory Bowel Disease (IBD) can irritate the intestinal tract and cause diarrhea. These conditions can be influenced by factors such as parasites and food allergies.

 

11. Metabolic Diseases: Issues in organs like the pancreas or liver can disrupt normal digestion and cause diarrhea, often accompanied by weight loss.

 

12. Medications: Certain medications, especially antibiotics, can imbalance gut bacteria, weakening the immune system and potentially leading to diarrhea. It’s common for dogs to experience diarrhea after antibiotic treatment due to this imbalance.

 

13. Ingesting a Foreign Object: If your dog eats something indigestible, it can lead to diarrhea. If you don’t know what your dog ate and they’re vomiting or having diarrhea for more than two days, contact your vet immediately. If you know what they ingested and they seem well otherwise, you can try some first aid steps. For objects more than 1.5 inches in diameter, induce vomiting unless the object is sharp. If the object is not sharp, feed your dog a mixture of cooked squash puree and flaxseed to help the object pass smoothly. If the object is smaller, it will likely pass through the colon. Feed your dog a mixture of meat, squash puree, and flaxseed for a few days until the object is eliminated.

 

14. Addison's Disease: This condition affects the adrenal glands, causing them to lose their ability to produce essential hormones. This leads to severe electrolyte imbalances and symptoms like diarrhea. If untreated, Addison’s disease can be life-threatening.

 

15. Lumbar Spine Injuries: Spinal health can impact digestive health. Lumbar spine injuries can cause digestive issues like diarrhea by disrupting the nerve and blood flow to the intestines. Though often overlooked, this can be a common cause of diarrhea.

 

Understanding these causes helps maintain your dog’s digestive health and overall well-being. Proper management, along with a holistic approach, can prevent and treat diarrhea effectively, ensuring your dog stays healthy and happy.



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01 Sep 2024