Best practice checklist

  1. Conduct autumn strongyle worm counts and spring egg counts to establish if medicated grit is required.
  2. Do not use medicated grit when worm burdens are very low (i.e. below mean of 1,000 worms in adult grouse). Over-exposure to medicated grit will escalate the onset of resistance to the worming drug by the worms.
  3. Monitor strongyle worm eggs in spring, especially in years when medicated grit is withdrawn.
  4. Medicated grit is only available under licence administered by a veterinarian. Evidence of high strongyle burdens in grouse population is required to gain the appropriate prescription.
  5. Comprehensive records of medicated grit use must be kept:
    • Date and quantity purchased
    • Manufacturer
    • Batch number
    • Date placed on moor
    • Location of grit heaps
    • Date grit withdrawn
    • Date of first shoot
  6. Provide a grit site per spring territory.
    • Conduct spring and July grouse counts to establish bird densities
    • Trays should be no larger than 20x15cm
    • Trays should have good drainage (slightly raising tray will aid drainage)
    • Avoid areas with standing water or running water
    • Faecal material should be removed on a regular basis
    • Heavily contaminated sites should be abandoned
    • Move trays 2-3 metres at each location annually if possible
    • Use small tray dispensers to prevent birds getting into trays and defecating in them
  7. Do not place more than 500g of medicated grit in each tray (500g will last a pair of grouse seven months).
  8. Remove all old medicated grit from box and remove from moor, only provide medicated grit December to June, or preferably March to June.
  9. To comply with the law, medicated grit should be withdrawn at least four weeks before the start of shooting to prevent the drug entering the human food chain. Once medicated grit is withdrawn, ensure grouse have access to plain quartz grit with no medication.
  10. Place 250g of plain quartz grit two to three metres from medicated grit box, on “clean” ground to help offset of crypto contamination at gritting sites.

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✓ History of disease
✓ History of control
✓ Medicated grit
✓ Assessing grouse for worms
✓ Deployment of medicated grit and grit box hygiene
✓ Best practice checklist

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