sentences:  Those with alloantibodies should be stripped of colostrum at the time of parturition, and foals should be given an alternative source.Mares with alloantibodies to the Ca blood group are not at risk for producing neonatal isoerythrolysis in foals, and may be at decreased risk for NI in their foals (see above), so do not need an alternative colostrum source provided to their foals if the foal is Ca positive.Blood groups that have been associated with NI, such as Ab, De, Ua, and Pa, are generally not used in risk assessment of mares.