The British Cattle Veterinary Association meets every year to discuss new developments in the science and practice of meeting the veterinary needs of cattle and largely dairy cows.   Last year a paper claimed that 25% of dairy cows had SARA as diagnosed by rumenocentesis in a study conducted before the launch of the farmBolus.  So with colleagues in Three Counties Feeds and EBVC we presented some of the data from our studies on West Country dairy farms to the BCVA Congress held in the very convenient location of Hinckley Island just off M69. The presentation gives 8 figures of different rumen pH profiles showing the effect of different systems of feeding on rumen pH profile.  The biggest surprise was the sheer variability between farms.   The slides can be downloaded from here. Robotic milking seems to allow a very regular feeding profile with plenty of activity at night in contrast with the traditional cake and grass.  The key features to list are the mean pH per day, the range of pH per day, the number of drops in pH which indicate feeds per day, the slope of drop indicates the energy density or digestibility of the feed and the daily variance indicates the stability of the routine.