Changes

Feeding behaviour can also be affected. Individual cows may show inappetance for 24-48h, with no other clinical signs and spontaneous resolution. Animals can also be seen to "drop the cud" while ruminating, and feed efficiency is reduced. This reduced efficiency may not be noticed in the field situation, but has been demonstrated experimentally and is associated with the passage of undigested food in the faeces.  

Feeding behaviour can also be affected. Individual cows may show inappetance for 24-48h, with no other clinical signs and spontaneous resolution. Animals can also be seen to "drop the cud" while ruminating, and feed efficiency is reduced. This reduced efficiency may not be noticed in the field situation, but has been demonstrated experimentally and is associated with the passage of undigested food in the faeces.  

SARA can impact production parameters.

SARA can impact production parameters. Milk yield is lowered, although on farms where subacute rumenal acidosis is an ongoing, chronic problem, this may not be recognised. Milk butterfat levels are also reduced, which may be due to two factors. Firstly, milk fat is produced from acetate and butyrate, which in turn are produced from fibre in the diet. Dietary fibre is often reduced in SARA

and so butterfat levels are, in turn, decreased. Alternatively, the changes in the rumen environment in subacute rumenal acidosis could interfere with the biohydrogenation of fatty acids, and milk fat could be reduced in this way.

The incidence of a number of diseases is increased by concurrent subacute rumenal acidosis.

precise aetiology of reduced milk butterfat. Traditionally,

amount of long fibre (physically effective NDF or peNDF)

in the diet, and milk fat is dependent on the amount of

butterfat levels are acceptable in the face of a ruminal acidosis

* Increased numbers of cases of digestive disease,

* Increased numbers of cases of digestive disease,

including displacement of the abomasum;

including displacement of the abomasum;