July, Po Valley. On a Holstein dairy farm, several calves in their first weeks of life, housed in individual hutches, presented circular skin lesions a few centimeters in diameter on the muzzle, head, neck, and back. These were exudative lesions, with hair standing up in rounded tufts, which later tended to dry into crusts that detached easily. The animals were in good condition, fed normally, and showed no particular itching.
