Beef Cattle DeWorming & Feeding Instructions

CATTLE – Dairy and Beef:

Mix 1 pound of the Type B (0.5%) medicated feed containing 4,540 g/ton of fenbendazole with 4 pounds of feed ingredients to manufacture Type C medicated feed containing 908 grams of fenbendazole per ton equivalent.  Feed the resulting Type C medicated feed as the sole ration for one (1) day at the rate of 0.5 pounds per 100 pounds of body weight to provide 2.27 mg fenbendazole per pound of body weight.  This 5 pound Type B Medicated Feed containing 908 g/ton equivalent will treat a 1000 pound beef or dairy animal. Do not underdose.  Ensure each animal receives a complete dose based on a current body weight.  Underdosing may result in ineffective treatment and encourage the development of parasite resistance.



Milk taken during treatment and for 60 hours after the last treatment must not be used for human consumption. Cattle must not be slaughtered for human consumption within 13 days following last treatment with this drug product. Not for use in beef calves less than 2 months of age, dairy calves, and veal calves. A withdrawal period has not been established for this product in pre-ruminating calves.



Parasite resistance may develop to any dewormer, and has been reported for most classes of dewormers.  Treatment with a dewormer used in conjunction with parasite management practices appropriate to the geographic area and the animal(s) to be treated may slow the development of parasite resistance.  Fecal examinations or other diagnostic tests and parasite management history should be used to determine if the product is appropriate for the herd, prior to the use of any dewormer.  Following the use of any dewormer, effectiveness of treatment should be monitored (for example, with the use of a fecal egg count reduction test or another appropriate method).  A decrease in a drug’s effectiveness over time as calculated by fecal egg count reduction tests may indicate the development of resistance to the dewormer administered.  Your parasite management plan should be adjusted accordingly based on regular monitoring.