Show free from abortion it if a herd Is tree free from infectious abortion the owner can call through the application of sanitary measures pre vent its intro introduction duclion since abortion and breeding diseases are frequently introduced through the pur purchase chaee of infected aul animals mals caution in buying may prevent disaster A clem clean herd can also be developed from a mildly infected herd but it if the herd la Is badly diseased rt it la is probably more econom Ali leal calito i to replace herd with bealts ani animals |