Pink eye will Not have a pinkness look to an affected eye. Pink Eye is spread from cow to cow by flies, they light on affected eye drainage, and then travel to a healthy eye and poof you get an infected bunch of eyes.
There is a helpful vaccine, for Pink eye, but quick treatment will help prevent damage to the eye from an ulcer, which is the common trouble caused by Pink eye, the first sign of pink eye will be increased drainage of the affected eye, you will also be able to see a small pin head sized ulcer starting to form in the affected eye.
There are old remidies used to treat Pink eye that work, staining the eye, injecting steroids into the eye, using an eye patch to prevent light damage and eye damage from rubbing against things to scratch the itching sensation, pet milk sprayed into the eye, etc. But ask your vet for the most affective and rapid course of treatment, this will prevent any permanent sight loss.
Fly control, ear tags etc. will reduce flies around the eyes which can contribute to the increased incidence of pink eye. Also cattle with no pigment around their eyes are more suseptable to pink eye, cancer eye etc., there is nothing that can help them other than breeding to solid colored cattle, or ring eyed/goggle eyed, to protect future generations from future problems.