Internal parasites impair production by increasing energy costs of maintenance and diet digestibility, reducing feed intake, and increasing activity of the immune system. They have a much greater impact on profitability of beef cattle operations than most of us really think. Research has shown weaning weights can be increased by over 30 pounds and pregnancy rates by over 10% by deworming cows in the spring and again in mid-summer.
There are 3 classes of dewormers in use today: imidazothiazoles (products such as levamisole),…
