Harkers Spartix TabletsSpartrix is a one tablet canker treatment Spartrix is in a handy tablet form so pigeons can be treated individually ensuring all birds receive the required dose 50 tablets, 1 tablet per bird Whenever canker is seen, all birds should be treated Containing 10mg Carnidazole Adult birds should be treated before breeding and again before racing season Young birds should be treated with half a tablet at weaning or before flying out