| 1. Subclinical infections (less
than 30 eggs per gram of feces). |
| a. |
In several trials conducted in Montana, Oregon, and
Utah, deworming cows with a broad spectrum product that
kills inhibited larvae as well as immature and adult parasites
has been shown to be cost-effective. Cows dewormed
in the late fall carry more weight through winter, wean
heavier calves, and in some cases breed back faster than
non-treated controls within the same herds. |
| b. |
Individual producers in consultation with their veterinarians
need to decide whether deworming cows with subclinical
infections will be profitable for their operations. |
|
|
| a. |
Cows: Deworm in fall to provide maximum benefit. |
| b. |
Calves: Deworm at weaning if you are keeping them or
are getting paid by the buyer to do so. |
| c. |
Stockers: Deworm at weaning (or aquisition) and thereafter
as required or indicated by finding parasite eggs in fecal
samples. |
| a. |
Cows: Deworm in fall same as above, then again in the
spring. The third deworming should be given 3 to
4 weeks later. Third treatment may be delayed depending
on product used and/or negative egg count after 4 weeks. |
| b. |
Calves and Stockers: Deworm in the same pattern as cows
as well as at weaning or acquisition. |
| Note: For improved results, move cattle
to a clean pasture (free of parasites) immediately after
deworming. |
|
