Extensions to a veterinary health and management program data system for dairy herds.

This paper reports additions to our previously described veterinary health and management program for dairy herds. These include a graphical representation of mean milk production per cow per day, a current and historical record of the distribution of the herd in reproduction states, a standardised index of clinical mastitis and an index of the degree of nutritional anoestrus in a herd. For seasonally-calving herds, new categories of cows requiring examination or consideration have been added to selection lists. These are cows which have no oestrus recorded for 30 days preceding a nominated date for the commencement of breeding and those which have no oestrus recorded for 30 days after the nominated date.