An assembly and method for feeding and milking animals is disclosed. The assembly is provided with an area where the animals are allowed to move freely, with a number of juxtaposed feeding stations for the animals, and with a retaining device for retaining an animal at a feeding station. The retaining device can be activated for retaining an animal and can be deactivated for releasing an animal. A mobile milking robot connects at least one teat cup to a teat of an animal, a computer system controlling the operation and movement of the milking robot. The mobile milking robot is a self-propelled mobile milking robot, and the retaining device is fixedly disposed at the feeding station.