I have a bull calf 5 mo old that got white hairless spots on his head, he was penned with a young heifer & now she has them on her head & legs , He is starting to grow back some hair in the spots, I was told this is warts?? & it has to run its course nothing I could do, Is this true?? does not look like a wart to me , I have wormed & they are vacc. How contagious is this can I remove them & put other cattle in the pen without infecting them?? Is there a remedy for this?? THANKS!!