3 March 2015

Milk producers are being urged to monitor cows closely for signs of acidosis throughout the grazing season, with research showing that one in ten animals could be suffering from sub-acute ruminal acidosis (SARA).

A study in Ireland investigating the rumen pH of grazing cows supplemented with less than 2kg/day of concentrate showed that 11% of cows were suffering from SARA, 42% were at high risk and only 47% had a rumen pH within the normal range (pH>5.8). A study of 100 grazing herds in Australia produced similar results.

“It appears that modern ryegrass swards pose a significant acidosis risk whenever cows are grazing, not just in the spring” states Dr Nicola Walker, AB Vista’s Ruminant Product Development Manager. “Even a small meal of starchy concentrates can then push cows over the limit.”

Dr Walker is advising milk producers to be on the lookout for any unexpected reduction in feed intakes, milk yields or butterfat level, as well as undigested feed or mucin tags in the manure. Where levels of supplementary concentrate are higher than in the studies, the incidence and risk of SARA will potentially be even greater, she warns.

“Any time the rumen drops below pH5.8, its ability to function will be impaired, and under pH5.5 cows are considered to be suffering from SARA. With significant negative effects on milk output and cow health issues like laminitis, it’s important to avoid SARA whenever possible.

“Limit in-parlour feeding to 2kg/cow/day, switch to a compound high in digestible fibre and consider feeding an efficient rumen conditioner like Acid Buf or Vistacell live yeast to help stabilise pH,” she adds. “With a typically yield increase of up to 2 litres/cow/day, even before signs of SARA are evident, the returns will far outweigh the additional cost.”


Notes to editor:

AB Vista is a leading global supplier of micro-ingredients for the animal feed industry.

For further press information please contact Nic Daley or Mike Keeler on +44 (0)20 8647 4467.



About Us

AB Vista is an animal nutrition technology company offering pioneering products and technical services to the global animal feed industry. Since its establishment in 2004, AB Vista has grown to be a top-three player in feed enzymes and is also one of the largest suppliers of natural betaine to the global animal nutrition industry. The company invests heavily in research and development and has a growing portfolio of products and services spanning the poultry, swine, ruminant and aquaculture sectors. AB Vista is headquartered in the UK, with regional offices located in the USA, Brazil, Singapore, Spain, India, China, Germany and Finland. AB Vista is part of AB Agri, the agricultural division of Associated British Foods, one of Europe’s largest food & retail companies with a market capitalisation of £22 billion.