In view of the general practice of Dehorning cattle, the name hornfly is less distinctive than it once was.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
Dehorning should, when possible, be performed in cool weather when the flies are not plentiful.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
In Dehorning with these instruments the cutting edges should be slipped down over the horn and the knives closed, so that their edges set firmly against the horn in such position that the cut will be made in the right place and in the right direction.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler