In order e.g. to obtain an effective washing system which provides effective treatment for treating hoof diseases there is disclosed a hoof washing system (102) including a floor surface (202), and a plurality of animal guides (106), and at least one sensor (108) for sensing a presence of the animal in or adjacent to the washing system, and at least one jet sprayer (204). The floor surface comprises flow providing means so as to provide a downward or sideways flow (602, 402) of washing liquid out of the system. The jet sprayer is arranged so as to provide a jet of the washing liquid parallel with the traffic direction (104) towards at least one hoof (708) and the lower part (702) of at least one animal leg, and the system further comprises speed limiting means (214, 306, 308, 802) so as to limit a traffic speed of the animals through the washing system.