Abstract: A method for automatic control of breeding of free-range animals is disclosed, wherein the feed consumed by each individual animal is uniquely identified and registered to enable full traceability between animals or products and the feed. In particular, the present method comprise active and automatic control of the living conditions of the animals based on the monitored and recorded data so that a minimal amount of human interaction is required in the normal operation of a breeding system controlled by use of the method. The invention further relates to a controlled system, typically comprising a general-purpose computer having a suitable computer program installed thereon, for controlling the operation of a breeding system according to the present method.