Urine is collected with a suspended harness, urine bag and surgical tubing, the mares are not exercised and the collection devices chaff their legs and lower bellies raw. Mares that can no longer product enough estrogen to sustain the profit margin are sent on a final trip to the slaughter house, along with most of the foals born on the farms. These is an alternative to Premarin.
Many doctors agree.
Reproduced with permissions. However, with a decrease of the use of the drug, less horses will be bred and therefore less slaughtered. It's not the farmers to blame, but the manufacturers and the government.