Story: Diseases of sheep, cattle and deer

Polioencephalomalacia in sheep

Polioencephalomalacia in sheep

Polioencephalomalacia is a relatively rare disease, which is caused by thiamine deficiency associated with a diet high in sulphate. It results in the animal ‘star gazing’, as shown in here, or ‘dog sitting’ – becoming blind, circling aimlessly or having a dejected appearance. It is invariably fatal.

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Photograph by Gary Clark

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How to cite this page:

Gary Clark, Neville Grace and Ken Drew, 'Diseases of sheep, cattle and deer - Reproductive and nervous system diseases', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/en/photograph/17440/polioencephalomalacia-in-sheep (accessed 8 August 2020)

Story by Gary Clark, Neville Grace and Ken Drew, published 24 Nov 2008