A method of automated milking and/or treating of animals, which method comprises a number of steps for milking and/or treating the animals, such as cleaning the teats and/or foremilking and/or milking and/or stripping and/or disinfecting the teats, etc., in which there are at least two variants for at least one step and in which for the at least one step a variant is chosen at random, e.g. by means of a random generator, or periodically, said variant subsequently being carried out.