Does anyone know of a toxin or poisonous plant that could cause mares to have still born foals? I've raised several foals each year since 2002 and have never lost a foal. This year we have lost 3. The first looked healthy??? The second was completley in the sac still and the sac was abnormally thick. Guessing the foal suffocated. The 3rd was born with several abnormalties-head was 1/2 moon shaped, very crooked front legs etc. We have had 2 born perfect and healthy. We run our mares in pasture year round (1000 acres or better) and also foal in pasture and only get them in during storms. We haven't done anything differently and haven't fed anything different to them. I'm thinking with the drought perhaps they ingested some kind of poisonous plant???
Any ideas would be greatly appreciated. Instead of being excited to see the mares and foals every morning, I dread the thought of finding another dead foal. 5 to go-please pray they are healthy!