Rumen health is foundational to dairy cow welfare, with subacute ruminal acidosis representing a widespread, often unrecognized welfare problem.
Rumen health represents an underappreciated welfare dimension in dairy cow management because the discomfort of subacute ruminal acidosis is chronic and internal, without external signs that trigger immediate management response. SARA occurs when the rumen pH drops repeatedly into acidic ranges that cause mucosal irritation, disrupted fermentation patterns, and absorption of bacterial toxins. Affected cows show reduced rumination, altered feeding patterns, and progressive lameness as a consequence of inflammation. The link between rumen health, lameness, and immune function means that rumen management is simultaneously a welfare intervention across multiple body systems. Nutritional management that maintains adequate physically effective fiber while meeting energy requirements is the foundational prevention strategy.