Victoria

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Go to the Drench Decision Guide

 

Program summary

The WormBoss worm control program has five components that are most effective when used in combination.

A summary of the components is below (see further chapters for details).

1. Use grazing management to create low worm-risk paddocks

• Prepare autumn and winter weaner paddocks by using ‘Smart grazing’ where possible. Give the weaners an effective drench before they enter the 'Smart grazed' paddock.
• Choose the least contaminated kidding paddocks for the most susceptible kidding does (maidens, twin-bearing, or poorer condition).
• Provide adequate browse where possible.

2. Breed and feed for goats resistant and resilient to worms

• Use bucks with better than average worm egg count Estimated Breeding Values (WEC EBVs) in KIDPLAN by choosing the more negative values. 
• Maintain good nutrition to enhance the goat’s immunity to worms. 

3. WormTest at recommended times

• During January–February (with a larval differential) for goats showing signs of barber’s pole worm (anaemia and lethargy)—aside from known barber’s pole worm areas, this can also occur in wet summers or irrigation areas.
• All mobs in late January/early February, just prior to the second summer drench. This will usually be 6–8 weeks after the first summer drench.
• Weaners, 4–6 weeks after the autumn break and through winter. However, under high risk conditions (pastures highly contaminated with worms/higher rainfall areas/wetter than normal) test as soon as 2 weeks after the break.
• Higher risk mobs in July/August (usually youngest and oldest). Test other mobs if high worm egg counts are found. These results will give a check on peak winter egg counts.
• Does pre-kidding (provided it is at least 8 weeks post-autumn break for adults and 6 weeks for maidens). This is especially important for doe mobs struggling with low condition score (less than 2.5) and/or grazing pastures of less than 1200kg DM/ha (3–4 cm pasture height).
• Bucks: at 4–6 week (summer) or 6–8 week (winter) intervals after a short-acting drench and ensure a WormTest occurs one month before joining.
• Dry adult goats should still be monitored at 4–8 week intervals.
• If DrenchTest results are not available, conduct a DrenchCheck 14 days after treatment.
• And at other non-routine times as suggested in the Drench Decision Guide.

4. Drench^1,2 strategically at recommended times

• Quarantine drench all introduced goats with an effective short-acting drench that provides (for meat goats) four drench groups including one from either of the most recently available products or (for dairy goats) fenbendazole and abamectin which are registered for use where milk is for human consumption.
• The first summer drench in November/December.
• Breeding does pre-kidding (as they temporarily lose their immunity). If using a persistent drench then see ?Effective use of long-acting drenches.
• Goats going onto paddocks that are to be kept low worm-risk for weaners.
• Kids at weaning.
• Drench individual goats showing obvious signs of worm related illness and WormTest the rest.
• At other times, use the Drench Decision Guide, to make drenching decisions. 

5. Manage drench resistance 

This is an up-to-date, integrated regional worm control program for goats in Victoria. It builds upon earlier programs and accumulated knowledge (Including from the University of Melbourne’s Mackinnon Project), new information from the Integrated Parasite Management in Sheep project, funded by Australian Wool Innovation and ‘Parasite control in southern prime lamb production systems’, funded by Meat and Livestock Australia.

The program aims to improve the profitability and welfare of your goats through:

• fewer deaths and illness from worms
• fewer drenches, particularly long-acting drenches
• improved productivity
• prolonged life of drenches

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Authors:

Maxine Lyndal-Murphy (private consultant), Sandra Baxendell (Goat Veterinary Consultancies—goatvetoz), Lewis Kahn (ParaBoss), Deborah Maxwell (ParaBoss), David Hucker (Para-Tech Veterinary Services [Vic]), John Larsen (Mackinnon Project, University of Melbourne) and Graham Lean (Graham Lean and Associates).

Acknowledgement:

This document is based on the sheep WormBoss regional program with changes supported by the Goat Industry Council of Australia and funded by Meat and Livestock Australia through the project ‘Expansion of WormBoss Website to Include Goats B.GOA.0120’.

The contribution of David Rendell to this program is acknowledged as is the research performed by scientists from the former CSIRO Division of Animal Health, the Victorian and South Australian Departments of Primary Industries (or their equivalent), The Mackinnon Project (University of Melbourne School of Veterinary Science) and the cumulative knowledge and experience of sheep consultants in this region (often published in Proceedings of the Australian Sheep Veterinarians, a special interest group of the Australian Veterinary Association).