Bayer Cydectin Beef and Dairy Cattle Pour-OnCydectin Pour On is approved for use on beef cattle and dairy cattle (including lactating dairy cattle) for the treatment of infections and infestation of internal and external parasites. This easy to use pour on contains a weather proof formula with a purple dye to show which animals have been treated. Cydectin provides broad spectrum control which has been shown to result in increased weight gain1 and reduced pasture contamination. Cydectin has been