Our neighbor is trying these nose tags (Blags ?) during his weaning process. He was told by his nutritionist that this way is less stress on the calves, even though they can't suck, they're still with their mothers for the 10 days. I am wondering though, that when they finally do separate the cows from calves, aren't they gonna get stressed? I'm anxious to see if the neighbors feel this works for them. Has anyone ever used these nose tags?