Remove the mare to another location, leaving the foal in his surroundings and with the other weanlings or an older "babysitter".
Moved the mare out of sight and sound of the foal. This is stressful and causes a lots of running back and forth at the fence line and whinnying between mare and foal
It isn't a good ideato separate the mare and foal during the day and stall them together at night as some do, as thisstarts the stress over again each day.
It has been shown in studies that foals who suffer too much stress when being weaned can lose their appetites and lose weight... then when they recover have a growth spurt. This can cause developmental orthopedic disease (DOD), in which bones and joints begin to grow abnormally. Possible causes are:
Contracted tendons
Physitis
Bone cysts in the joints
Foals which have little stress during weaning grow evenly with height and weight increasing in steady increments. This smoother growth pattern makes them less susceptible to DOD.
Other problems can occur when foals are weaned and under undue stress: