We are extremely dry here and my pasture is right next to a dirt road with a lot of dust. I have about 8 calves that have developed a large white spot on their eye (pinkeye i think) and i think it is from the dust plus fescue grass seed that i let get too tall before i clipped it. My question is will their eye problems go away over time without treatment or do they need to be gotten up and given a shot of LA200 or penaquas penicillin. They look awful.