I've had very good luck pouring cows, bulls and retained heifers twice a year, once each during spring and fall pm vet visits. One year /two visits with Ivomectrin and next year/two visits with cydectin. Steers get poured once as young calves in the spring pm visit. Seems to me using ANY product continuously will result in a build up of resistant parasites.
Edited by Jim 3/10/2017 10:34
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