The excretion of residual amounts of acedist and dovenix with the milk of sheep that had been treated with these preparations was established on the 24th, resp., up to the 27th day following treatment, though their presence in the milk was found to drop sharply after the third day. The treatment with acedist led to a dependable decrease (P less than 0.05) in the hemoglobin amount, the total protein, and the erythrocyte count, and a dependable increase (P less than 0.05) in the leukocyte count. The intensity of these changes subsided parallel to the decrease in the residual amounts of the preparation in the milk excreted. The treatment with dovenix did not result in any deviations of the indices refered to.