Pasture, Soil & Grasses
|Horse Worms and Worming|
|When to Deworm Horses|
|Controlling Horse Worms on Pasture|
|Worm Resistance to Wormers|
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Wormer Resistance: The sensible way to avoiding anthelmintic resistance in horse worms
Increasing resistance in red worm populations, particularly the small red worms (Strongyles) to wormers of the Benzimadole group, has been confirmed by the Moredun Research Institute in the UK. Resistance is already well established in Europe, due to the over use of chemical wormers.
Pinworms (Oxyuris equi) are also a growing problem. UK livery yards, report many horses are carrying heavy burdens of pin worms immune to conventional wormers.
The Wrong Approach to De-Worming
By concentrating high doses of chemical wormers on worms resident in the horse, a gene pool of super resistant worms has evolved, resistant to all chemical & bacterial wormers. Horse owners have been encouraged by the big pharmaceutical companies to regularly dose horses every 6 to 8 weeks, all year round. In their greedy quest for big profits they have chosen to ignore the climate, worm biology and life cycles. The consequence of this overselling and over dosing has been the development of super resistant horse worms. The simple truth is that horses do not need to be dosed all year round every 6 to 8 weeks to be worm free.
Routinely deworming all the horses every 2 months kills all the worms susceptible to chemical & bacterial wormers, leaving the resistant worms to lay eggs and multiply unchecked. The gene pool of resistant super worms develops with every deworming, leading to your pasture being infected by a strain of super worm resistant to chemical wormers. This has severe health implications for horses such as anaemia, gut ulceration, colic etc.
In recent years, the idea that rotational deworming (by using drugs of different classes for each deworming) would overcome worm resistance was much promoted. In America and Northern Europe, resistance to two of the three-dewormer drug classes – Benzimidazoles (i.e. Fenbenzadole and Oxibendazole) and Pyrimidines (i.e. Pyrantel) has been well documented. There have also been reports of resistance to macrocyclic lactones (Ivermectin, Moxidectin) in Europe and Brazil. No longer can we rely on rotational worming to kill all horse worms. Alarmingly, these three classes of chemical dewormers are the only anthelmintics, the pharmaceutical companies have to offer.
A New Approach to Effective Worm Control
A blend of traditional herbs added to the feed to maintain the overall health of coat and gut whilst repelling unwanted internal parasites. Added to the feed over 5 consecutive days. One litre is sufficient for an average sized (500kgs) horse for 2 parasite repel applications 8 to 12 weeks apart. Two litres is enough for one average sized horse, to cover the entire year's parasite repel program, 4 seasonal applications in all.
N.B. Not suitable for pregnant/lactating mares or foals under 6 months old.
Contains: Extracts of traditional vermicide & demulcent herbs. One litre self dispensing bottle
Free Faecal Worm Count Kit & Moon Calendar is included and full directions on using Zilch Verm
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