Worm management is an important aspect of rotational grazing and cross grazing pastures. There will almost always be some worms in the pasture and in the horses; the management aim is to minimise loads and prevent adverse effects on the horses from worms.
Removing horse poo from paddocks and composting it is an effective means of controlling worms in the pasture. Active dung beetles will also control worm loads, because worm eggs do not survive the passage through the dung beetles’ digestive tract.
Resting paddocks in between rotations is another means of controlling worm loads, but the length of rest period required can be quite long. It depends on temperature and moisture.