Subacute rumen acidosis (SARA) represent one of the most important metabolic disorders in intensive dairy farms that affects rumen fermentations, animal welfare, productivity and profitability. A practical need for Veterinarians and Food practitioner, is to have a simple and economic method of diagnosis of SARA, in order to implement in a timely manner the appropriate corrective diet, eliminate the causes of arrival of this disorder and avert the danger of progress in the same very high levels. In response to these requests, the aim of this work, was to lead three different studies...