Mixtures of cottonseed oil and pine tar containing from 10 to 50 per cent of the latter substance were found by investigations in the Bureau of Animal Industry to have a marked repellent action against flies when applied lightly every day.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
cottonseed meal is one of the best feeds for this purpose, but it should be fed carefully, as too large quantities of it are injurious to cows.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
Feed rich in mineral salts may be given, such as beans, cowpeas, oats, cottonseed meal, or wheat bran.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler