dragon lady said:Ain't crazy! As long as the heifer is eating (pasture, hay, grain, ie creep) it should not be a big deal - I usually (except this year) wean all my calves at once and there is usually a straggler who is just 2 or 2 and a half months of age and it just doesn't seem to be an issue.I usually vaccinate once before weaning, also give an intranasal respiratory vaccine, and go for it. Repeat vaccine couple weeks after weaning. Good luck....