In the API we have not been able to find a way to get milk(Day)Yields per cow per date, because the events endpoint does not seem to consider milkDays (or milkVisits) as 'events'. 

(We would ideally be looking for something like:

""date, tag, bdate, lact, fdat, yield""  where date would be the day of the milking, and the yield obviously being the yield for that date for a specific animal (with that tag).

As a sort of workaround, we have reverted to just 'expanding' our current query with item==m(0,2)&item==m(0,3)&item==m(0,4) to get a window of 3 days of yields for each animal.

We'd appreciate your input on how to best achieve this result.