We are baffled by this and would not encourage a blanket worming approach as treatment is likely to be unnecessary in the vast majority of horses. Furthermore, it will promote resistance on your property. It is true that we are seeing problems with small redworm disease but this is the result of inappropriate worming last year and not the weather this year.
The mild winter and early spring will however mean that levels of worm eggs and larvae on pasture will increase more rapidly through the grazing season this year and this will increase the risk of disease later this year or early next, especially in young animals. You should therefore be speaking to your vet about your worming plan if you haven’t already.
These concerns and the confusion highlight the need for a targeted and flexible approach to worming in which you monitor levels of worm eggs on your pasture and work with your vets to prevent dangerous levels of infection developing whilst minimising the risk of resistance. Following the more traditional approach of worming at regular intervals is not sufficient to ensure that you prevent disease if resistance is present or you use the wrong products.
If you have not performed worm egg counts yet this year, then you should do very soon and you should also consider checking for resistance. We would be pleased to speak to you if you have any worries over any worming-related issues. By getting your plan right now you will reduce the risk of disease later this year and into next.
If in doubt, please call us for some free advice rather than purchasing a potentially unnecessary wormer.