I was under the impression that certain breeds (holsteins for one) have been so over bred for the milk producing trait that there are periods where there milk production is so high, not being milked can actually cause the udder to tear allowing them to die from sepis. Note: that's anecdotal I don't have information confirming or denying it.

Am I right in understanding this, you're looking to aggregate data already available from other databases into your own custom database with a custom front end? Assuming so a simple MySQL database could hold it with a couple BioPython scripts to fetch the data. A PHP page would allow you to make it easily usable for your pathologists. This is assuming it's all pretty straight forward, or did I miss the point?