Story: Diseases of sheep, cattle and deer

Drenching cattle

Drenching cattle

There may be hundreds of thousands of internal parasite worms in a cow’s gut, and each gram of dung dropped can contain thousands of eggs that will hatch on the pasture into microscopic larvae ready to be eaten by other stock. Young stock are most affected by these internal parasites and need early drenching with an anthelmintic, or special management, to keep numbers low. Older cattle such as these may also require strategic drenching.

Using this item

Archives New Zealand - Te Rua Mahara o te Kāwanatanga
Reference: AANR 6325/W3302 Drawer 1

All images & media in this story

How to cite this page:

Gary Clark, Neville Grace and Ken Drew, 'Diseases of sheep, cattle and deer - Cattle parasites and other problems', Te Ara - the Encyclopedia of New Zealand, (accessed 22 May 2022)

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