Feline chronic diarrhea: causes and nutritional management

Chronic diarrhea is a common clinical sign in cats, caused by various underlying conditions. Chronic diarrhea can be classified as either small or large bowel diarrhea based on clinical signs. The mechanisms involved are complex, including osmotic and secretory diarrhea, impaired intestinal barrier function, and dysregulated intestinal motility. Given the complexity of the causes of chronic diarrhea, accurate diagnosis of the underlying mechanisms is crucial for effective treatment. Additionally, nutritional management is indispensable for the long-term treatment of chronic diarrhea. This article will review the diseases that may cause chronic diarrhea, introduce their pathophysiology and diagnostic methods, and provide related nutritional management strategies.