
06/04/09, 07:05 AM
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Join Date: Nov 2004
Location: New Zealand
Posts: 2,558
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Ivermectin Injectable is very good but I tend to opt for pour-ons as they are easier to administer particularly if you are working on your own.
I would be inclined to have a talk to your local vet or even local farmers to find out the worms you should be targeting for your area. As an example, I have a huge problem with Liver Fluke so buy a drench that will target that as well as the other worms common to cattle. The frequency of worming will be dependant on your farming regime i.e. rotational grazed cattle tend to need drenching less often, as well as the area you live in. You may also find that some cows have less resistance to worms than others. But if you want to cover all bases, you can be fairly safe in drenching in spring and again in autumn.
Calves should be drenched at weaning and again 4-6 weeks later, after that on a needs to basis or twice yearly depending on what suits your system.
Agree with Agman though, if your cattle have a worm burden at the moment, drench again in two weeks to get rid of eggs that may have hatched between times.
Cheers,
Ronnie
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