Summary:
- Use drenches most effective on your property: ideally those that are 98% effective, as shown by a drench test. Especially important for strategic summer drenches in winter rainfall regions
- Better to use a combination of drenches from 2 or more different families when drenching
- Use short-acting drenches. Reserve use of long-acting products for specific purposes and high worm-risk times of the year
- Rotate among all effective drench groups each time herd is drenched
- Calibrate drench guns, dose to heaviest in mob (or split mob if large weight range), follow label instructions
- If only have a small herd, test all animals and only drench those with high FEC
