Four healthy balady rams were used for exper¬imental rupture of the urinary bladder. The present study revealed the following results: •The operation influenced the body tempera¬ture, pulse and respiratory rates at varia¬ble degrees. •Transient increase of P.C.V. followed by fluctuations of this indice during the per¬iod of the experiment. At time of death PCV Value was low in three-rams. •Lowered Hb concentration was evident at first 12 hours followed by general tendency to decrease till time of death. •Variable degree of leucocytosis.