>Six Japanese Black cows were assigned to treatments using a 3 × 3 Latin-square design. The treatments were black-and-white painted stripes, black painted stripes, and no stripes (all-black body surface).
So apparently flies don't like white paint.
The idea of a blanket is better, but the problem is that the blanket would act as a tick sanctuary then.
Sometimes, it seems that everybody is trying to solve the wrong problems, in any case.