Rumen acidosis usually occurs in sheep that are introduced rapidly to grain feeding or have been grazed on stubble paddocks where there is a lot of grain left after harvest.

One of the recent challenges facing Trevor Johnson and his team at Paparata Station has been the changing climate.

Instead of running Paparata as one station, Trevor Johnson has divided it into four separately managed blocks - each designed to complement the other and run by four separate managers.

The so-called Forgotten Highway, between Taumaranui and Stratford, has many surprises to offer - if you care to stop and look. In farming terms, one of these is Paparata Station, near the settlement of Tokirima, owned by Trevor Johnson. Peter Burke recently paid a visit to this magnificent property.