Shaping the future of animal health

Choosing the correct strategy

Worming intervals

How often horses are wormed depends on the property’s management system. It is ideal to use the minimum number of treatments possible in a year, as over worming can lead to resistance. Depending on a number of factors, some horse owners will need to worm more often than others.

Where there are large numbers of horses kept close together and/or horses are frequently moving on and off a property, there will be a greater need for worm control. This is because these horses will be at the greatest risk of contamination. Horses in these situations, generally on studs or agistment properties, may need to be wormed every six to eight weeks.

It may be possible to worm horses less often where there are low stocking densities. The use of paddock management procedures like manure removal, paddock rotation and grazing with other species will also help lower contamination pressure.

All horses should be wormed at least once every three months, with faecal egg count testing conducted to identify the appropriate worming protocol suitable at that property to delay the onset of anthelmintic resistance. All horses on a property should be wormed at the same time. New horses should be quarantined and wormed before coming onto the property. If you are unsure about what drenching interval is right for your situation please consult your vet or local Virbac area manager.

choosing the correct worming strategy flowchart


download flowchart go to worming strategy tool

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