Afimilk Silent Herdsman is a patented, neck-mounted cow monitoring system, that detects estrus and health problems based on cow activity, rumination and eating patterns. Data is transmitted wirelessly from the collar via a base station to a central computer on the farm that issues alerts for changes indicating estrus or illness. Alerts are also sent via the cloud to smart phones and tablets. Producers are able to spend less time directly observing the herd and more time breeding and treating cows automatically identified by the system.