Investigations are underway into the sudden death of 120 cows on a farm in south Taranaki.
Owner John Murphy is distraught after the cows began dropping dead yesterday afternoon, 30 minutes after water troughs had been topped up using a portable tank.
Twenty vets from the area rushed to the farm to help, but there was little they could do.
The Ministry of Primary Industries has begun investigations centred on the portable tank.
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The dead animals represent about a quarter of the farm's herd.
