Recent Advances in the Clinical Management of Subacute Ruminal Acidosis in Cattle

Subacute Ruminal Acidosis (SARA) is a major metabolic disorder in high-producing dairy and beef cattle, caused by prolonged ruminal pH depression due to excessive fermentation of rapidly degradable carbohydrates and insufficient fiber intake, leading to disrupted rumen function, reduced feed efficiency, and negative impacts on animal health and productivity. This review examines current strategies for diagnosing and managing SARA, emphasizing recent diagnostic advancements such as computerized rumen mucosa colorimetry. It highlights key aspects of Total Mixed Ration (TMR) formulation, stressing the importance of maintaining an appropriate roughage-to-concentrate ratio and ensuring sufficient potentially fermentable Neutral Detergent Fiber (peNDF) to support rumen motility and microbial balance, while also discussing mathematical approaches for optimizing ration formulation. Additionally, it explores advancements in clinical diagnosis, including emerging biomarkers, rumen pH monitoring techniques, and the potential of rumen mucosa colorimetry for herd-level SARA assessment. By integrating recent research findings with practical recommendations, this review serves as a resource for veterinarians, nutritionists, and producers aiming to enhance rumen function, optimize productivity, and improve herd health in cattle prone to SARA.