twenty calves , week-old male holsteins , 42.8 kg body weight , were assigned to four treatments by oral dose 0 , 1.5 , 3.0 , and 6.0 mg lead carbonate/kg body weight given three times weekly until calf fetal hemoglobin had been converted to 100 % adult hemoglobin for 2 consecutive wk .
C0015936
fetal hemoglobin
C0019046
hemoglobin