Nylon calf weaner prevents the calf from nursing while allowing the calf to graze and have physical contact with the cow. Easy to apply by hand. Suitable for calves up to 18 months of age. Reduces the stress of weaning when used in a two step weaning program. Typically leave the weaners in the calves for 4-7 days, then separate the calves from their mothers and remove weaners. Washable and reusable.