What is Crohn’s disease in dogs?
Crohn’s disease in dogs is a chronic inflammation of the bowel that can affect the whole digestive tract but most often settles in the small intestine. The mechanism behind it is an excessive immune response to stimuli that are normally harmless — dietary components, gut bacteria or other substances. This misdirected reaction inflames the intestinal wall, damaging it and, as a result, impairing the absorption of nutrients. The inflammation can lead to ulceration, narrowing of the bowel and scarring, causing pain, discomfort and other clinical signs such as diarrhoea, vomiting and weight loss. The disease is also relapsing in nature, meaning the symptoms flare and subside at different times, which makes both diagnosis and treatment more complicated still.
Causes of Crohn’s disease in dogs
Crohn’s disease in dogs is a complex condition whose exact causes have yet to be pinned down, though researchers point to a number of contributing factors. Both genetic and environmental influences are thought to play a significant part. Certain breeds, including the Shar Pei, Boxer, German Shepherd and Beagle, are more susceptible, which suggests an inherited component. Genetic studies have shown that particular mutations in genes governing the immune response can raise the risk of intestinal inflammation. Environmental factors such as diet, stress or infection can trigger or aggravate the signs in predisposed dogs. So while the susceptibility may be genetic in origin, external factors also have a considerable bearing on whether this chronic disease appears and how it runs its course. Owners of dogs that may be at risk should stay alert to the earliest signs and consult their vet regularly to give their pets the best possible care.
Signs of IBD
The signs of the disease vary from dog to dog and usually centre on the digestive system. Owners may notice:
These signs can easily be mistaken for other health problems, so it is essential to monitor your dog closely and seek veterinary advice if they persist for any length of time.
Diagnosing the disease
Diagnosis can be complicated, because the signs resemble those of other conditions. Vets use a range of tests to reach a diagnosis, which may include:
Treating IBD in dogs
The cornerstone of treatment is a therapeutic diet, often high in fibre while low in ingredients that can provoke an inflammatory reaction, such as grains or dairy products. Specialist foods for dogs with intestinal disease can ease the signs and improve nutrient absorption.
Alongside diet, vets may prescribe anti-inflammatory and immunosuppressive medication to help control the intestinal inflammation and dampen the overactive immune response. Antibiotics are sometimes needed to treat secondary infections arising from the damage to the bowel. Dietary supplements such as probiotics are also worth considering, as they support the health of the gut microbiome.
What happens if Crohn’s disease in dogs goes untreated
Chronic intestinal inflammation can lead to ulceration, scarring and narrowing of the bowel, which in turn impairs nutrient absorption and causes deficiencies. Dogs may become malnourished as a result, losing weight, growing weaker and becoming more vulnerable to infection.
Left untreated, the disease can also give rise to complications such as intestinal perforation, a life-threatening emergency requiring immediate surgery. Prolonged inflammation may affect other organs, the liver and kidneys among them, adding further health complications. In extreme cases Crohn’s disease can shorten a dog’s life and seriously undermine their comfort and wellbeing. That is why early diagnosis and prompt, appropriate treatment matter so much: they minimise the risk of serious consequences and improve the quality of life of an affected dog.