Postweaning (42 to 56 d) measurements did not differ(P > 0.05) between FOS treatment groups (0.938 ± 0.084 kg BW gain/d,2.149 ± 0.231 kg starter intake/d,0.437 ± 0.041 feed efficiency, 1.2 ±0.009 cm hip width change). Of the10 fecal samples tested from the first 10 calves to scour, 5 were positive for rotavirus, 1 was positive for both rotavirus and coronavirus, 1 was positive for coronavirus, and 3 were negative