An animal treating arrangement includes a carrying device beside a milking platform rotating with a velocity and having animal places housing animals. The carrying device includes a fundament, a first bearing device (12) provided on the fundament, an arm (13) connected to the first bearing device permitting the arm to rotate in relation to the fundament around a first axis, a support platform (15) connected to the arm (13). A drive arrangement moves the support platform and includes a first drive member (31) rotating the arm around the first axis. A sensor (37) communicates with a control unit (36) and senses an instantaneous value of the velocity. The control unit controls the first drive member to move the support platform to follow the milking platform from a start position to an end position during a part of the rotation of the milking platform.