Posted by LonM on October 18, 2011 at 19:10:56 from (69.165.30.214):
In Reply to: cattle wormers posted by mosinee dave on October 18, 2011 at 10:55:57:
I have been told by veterinarians that the cheap stuff is cheaper not because of the active ingredient (which is the same ivermectin whether it costs $50 or $250), but because of the carrier. The carrier is what is responsible for a different withdrawal time. So it is basically up to you: do you want the active ingredient in the animal's system for a couple of days, or do you want it in there for the duration of a whole life cycle of the parasite? I believe you get what you pay for, not only this time around, but also by keeping the parasites from developing resistance quicker over time.
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