I'm impressed. Says 100% success rate when tested by vets and farmers.
http://www.topcanvas.co.za/cow_jack.aspx?fbclid=IwAR1ziwKZU4jUVdI10QpAVE5QDMU4Hu3rh-ffwx6fLP2-T_XmQ1ABe63BE9Q
http://www.topcanvas.co.za/cow_jack.aspx?fbclid=IwAR1ziwKZU4jUVdI10QpAVE5QDMU4Hu3rh-ffwx6fLP2-T_XmQ1ABe63BE9Q