In December, the mare develped laminitis, which the vet attributed to her being overweight a bit and possibly hypothyroid. So she was put on a diet and started on thyroid supplementation. She has been fine, the laminitis having cleared. This is my first season with this mare, but as per the previous owners, she has never had a problem in pregnancy. I know these people and I have seen the mare's offspring at the track so I have no reason to doubt them.
My question is whether anyone has had experience with hypo/hyperthyroidism and its treatment in their mares? I know that in people, hyperthyroidism can increase one's risk of spontaneous abortion, but I am not sure this extrapolates to horses. Could we have contributed to the loss with the thyroid meds?
Cultures were sent from the necropsy of the foal, an age-appropriately sized bay filly
Any thoughts appreciated.
Cathy