EN
Ferromagnetic foreign bodies of varied shape and lenght were inserted into the reticulum of 2 fistulated cows and afterwards the animals were given loose magnets. Manual examinations and 128 photographs taken by use of the intraoperative roentgenography showed that almost all foreign bodies were dispersed on the reticulum bottom. In the presence of the loose magnet, the objects located on its surface. In the walking animal the magnet was rolled and these displacements favoured easy picking up the foreign bodies. The ferrous materials were usually collected parallelly to the long axis of the magnet, displacing on its smooth surface. The significance of animal walking in treatment of traumatic reticulitis by use of magnets was discussed.