
Intestinal Dysbiosis in Dogs – Effects on Dog Health
What is gut dysbiosis in dogs?
Gut dysbiosis is an imbalance or disruption in the composition and function of the gut microbiome in dogs. It occurs when there is an overgrowth of harmful bacteria or a decrease in beneficial bacteria, leading to an unhealthy state within the digestive system. Gut dysbiosis can have significant implications for a dog’s long-term health and well-being.
When the bacteria in a dog’s gut is in balance, the state is referred to as eubiosis.
Causes of Gut Dysbiosis:
- Poor Diet: Feeding a low-quality diet that is high in processed ingredients, artificial additives, and fillers can disrupt the balance of the gut microbiome. Such a diet lacks the necessary nutrients to support a healthy gut environment, making dogs more susceptible to dysbiosis.
- Antibiotics and Medications: While antibiotics are essential for treating bacterial infections, they can also have unintended consequences on the gut microbiome. Antibiotics kill both harmful and beneficial bacteria, disrupting the delicate balance and potentially leading to dysbiosis. Other medications, such as nonsteroidal anti-inflammatory drugs (NSAIDs) and steroids, can also impact the gut microbiome.
- Stress and Environmental Factors: Stressful situations, changes in routine, and exposure to environmental toxins can disrupt the gut microbiome. Dogs are sensitive to stress, and chronic stress can affect their gut health, leading to dysbiosis.
- Age and Health Conditions: Aging and certain health conditions, such as inflammatory bowel disease (IBD), food allergies, or autoimmune disorders, can contribute to gut dysbiosis in dogs. These conditions often involve chronic inflammation, which alters the gut environment and disrupts the microbiome.
Symptoms of Gut Dysbiosis:
Gut dysbiosis in dogs can manifest through various symptoms, including:
- Digestive Issues: Dogs with gut dysbiosis may experience chronic diarrhoea, constipation, gas, bloating, or frequent episodes of vomiting. These symptoms indicate an imbalance in the gut microbiome and compromised digestive function.
- Skin Problems: Dysbiosis can contribute to skin issues in dogs, such as excessive itching (pruritus), rashes, hot spots, or ear infections. Skin health is closely linked to the gut, and an imbalanced microbiome can trigger or worsen these conditions.
- Changes in Appetite: Dogs with gut dysbiosis may exhibit changes in appetite, such as decreased or increased appetite, reluctance to eat, or finicky eating habits. Disruptions in the gut microbiome can affect the dog’s ability to properly digest and absorb nutrients from their food.
- Weight Changes: Gut dysbiosis can lead to weight loss or weight gain in dogs. Imbalances in the gut microbiome can affect metabolism, nutrient absorption, and energy regulation, influencing body weight.
- Behavioural and Mood Changes: Dogs with gut dysbiosis may display behavioural issues, including increased anxiety, aggression, or irritability. The gut-brain axis connects the gut and the brain, and imbalances in the microbiome can impact brain function and behaviour.
The Potential Health Impacts of Dysbiosis for Dogs
Dysbiosis can have significant health impacts on dogs. When the delicate balance of the microbiome is disrupted, it can lead to various digestive system issues, including colitis and inflammatory bowel disease (IBD). Understanding the potential health impacts of dysbiosis is crucial for identifying and addressing these conditions in dogs.
Progression of Digestive System Issues:
- Colitis: Dysbiosis can contribute to the development and progression of colitis in dogs. Colitis is the inflammation of the colon, which can result in symptoms such as diarrhoea, mucus or blood in the stool, increased frequency of bowel movements, and straining during defecation. When dysbiosis occurs, harmful bacteria may increase in number, leading to an inflammatory response in the colon. This inflammation can further disrupt the gut microbiome, creating a cycle of inflammation and dysbiosis.
- Inflammatory Bowel Disease (IBD): Dysbiosis is strongly associated with the development of inflammatory bowel disease in dogs. IBD is a chronic condition characterized by inflammation of the gastrointestinal tract. The exact cause of IBD is unknown, but dysbiosis is believed to play a significant role. Imbalances in the gut microbiome trigger an immune response, leading to inflammation and damage to the intestinal lining. Dogs with IBD may experience symptoms such as chronic diarrhoea, vomiting, weight loss, and poor appetite.
Impacts of Dysbiosis on Nutrient Absorption:
Dysbiosis can also impair the absorption of nutrients from the diet, leading to nutritional deficiencies and further health complications. When the gut microbiome is imbalanced, it affects the digestion and breakdown of food, making it difficult for dogs to extract essential nutrients. This can result in poor nutrient absorption, despite consuming a balanced diet.
Dysbiosis and a Weakened Immune Function:
A healthy gut microbiome plays a crucial role in supporting a robust immune system. However, dysbiosis weakens the immune function in dogs. The imbalance in the gut microbiome disrupts the interaction between the beneficial bacteria and the immune system, compromising the immune response. This can make dogs more susceptible to infections, allergic reactions, and other immune-related disorders.
Dysbiosis and Chronic Inflammation:
Dysbiosis contributes to chronic inflammation in the gastrointestinal tract. The imbalance in the gut microbiome triggers an inflammatory response as the immune system tries to restore balance. This ongoing inflammation can damage the intestinal lining, leading to further complications such as leaky gut syndrome. Leaky gut syndrome occurs when the intestinal barrier becomes permeable, allowing harmful substances and bacteria to enter the bloodstream, potentially leading to systemic inflammation and immune dysregulation.
Gut Dysbiosis and Behavioural and Mood Disorders:
Mounting evidence suggests a connection between gut dysbiosis and behavioural and mood disorders in dogs. The gut-brain axis, a bidirectional communication system between the gut and the brain, influences behaviour and mood. Disruptions in the gut microbiome can trigger changes in the production and availability of neurotransmitters, affecting a dog’s behaviour and mood. Dogs with dysbiosis may exhibit increased anxiety, aggression, and cognitive dysfunction.
Best Treatment and Prevention of Dysbiosis in Dogs:
- Diet Modification: A key approach to addressing gut dysbiosis is through dietary changes. Research shows that switching to a high-quality, balanced diet that includes functional foods, supports gut health can help restore the microbiome’s balance. Consider incorporating probiotic-rich foods or supplements and prebiotic fibres to promote the growth of beneficial bacteria. (1, 2)
- Probiotic and Enzyme Supplements: Probiotic supplements provide beneficial bacteria that can help restore the balance of the gut microbiome. These supplements introduce live cultures that can support a healthy gut environment. Digestive enzyme supplements can also aid in proper digestion and nutrient absorption. (3, 4)
- Minimising Stress: Minimising stress in a dog’s environment is crucial for maintaining a healthy gut microbiome. Provide a stable and calm environment, engage in regular exercise and mental stimulation, and ensure your dog feels safe and secure. (5, 6)
- Gradual Transitional Changes to Diet and Lifestyle: When introducing dietary or lifestyle changes, do so gradually to allow the dog’s digestive system to adapt and prevent further disruptions to the microbiome. Abrupt changes can cause digestive upset and exacerbate dysbiosis.
- Regular Veterinary Care: Regular veterinary check-ups are essential for monitoring your dog’s overall health, including the gut microbiome. Your veterinarian can provide guidance on specific dietary recommendations, supplementation, and any necessary medical treatments.
Gut dysbiosis in dogs is a condition characterised by an imbalance in the gut microbiome. It can result from various factors, including diet, medications, stress, age, and underlying health conditions. Recognising the signs of gut dysbiosis and taking appropriate measures to address it, such as dietary modifications, probiotic supplementation, and stress reduction, can help restore a healthy balance in the gut microbiome and improve the overall health and well-being of your dog.
Bonza premium vegan dog food offers support for gut dysbiosis. It is naturally hypoallergenic dog food, without common plant allergens – no corn, soy, wheat or rice – and includes Calsporin®, a high quality, clinically researched probiotic for dogs that supports a rebalancing of a dog’s gut microbiome and digestive system.
In addition Bonza also contains ingredients with prebiotic fibres including baobab, yucca extract, oats, sweet potato, quinoa, carrots and pumpkin, beneficial digestive enzymes including pineapple (bromelain enzyme) and papaya (papain enzyme), and chamomile that work to restore dogs’ gut balance and digestive harmony.
The inclusion of functional ingredients specifically selected to impact the dog’s microbiota and microbiome, make this a powerfully, anti-inflammatory dog food that supports a reduction in the uncomfortable symptoms of gut dysbiosis.



