We have received a number of calls from farms where one or two cows appear to be quite bright and in good form, but haven’t finished meal, aren’t grazing as well as they should and have a reduced milk yield. Often when we examine the cow, her rumen is slack and she has a scour that has undigested grass fibres in it.Where a grass shortage still exists, this has to be made up by continuing to feed moderately high levels of concentrates. The levels of starch in the 3kg to 4kg per day being fed would usually be tolerated, but the usual fibre from grass is missing.