I know low selinium in mares causes retained placenta, magnesium levels effect labour, but is their anything that can lead to foal hernias, as we have never had them before and all this years foal crop ended up with them.
Genetic causes can be ruled out I think, as can acutal damage to umbilcal are during or after birth.
Im more thinking that all 3 hernia are just the result of the abdominal walls not quite closing all the way before bith, ie developmental
