>>>>They are used specifically for pmu. They are kept in stalls and kept pregnant until they are to old. And the foals are sold at auction to whoever. We all know how that goes...
PMU farms have become more scarce in the last few years as demand for Premarin products has diminished.
There are strict regulations about mare confinement, turnout, foaling, weaning age and procedures, and etc., and farms are inspected regularly for compliance.Mares and new foals are usually pasture kept through the summer, and after the foals are weaned the mares are put "on the line" approximately 150 days each year, from Dec-April.
Many farms now use registered stock and try to produce foals which sell privately or at higher-end sales rather then en masse at low end auctions-- there are also futurity programs that have been created for stock from enrolled farms, so horses from PMU farms can go on and compete to earn money and prizes. The main one is NEARIC-- NAERIC - North American Equine Ranching Council Foals PMU Foals Ranching America Ranchers and Canada Ranch Premarin
I am not saying there aren't bad PMU farms-- but there are also bad race horse farms, bad dressage barns, bad lesson barns, bad show barns, and etc.... the life of a PMU mare might not be 100% ideal, but standing/laying in a warm barn eating all winter with turnout all summer and mandatory regulated vet and farrier care is not the worst life ever either.
Here are some links to PMU ranches that breed higher quality, registered horses. Kevin & Julie Bridgeman Bar RB Belgians - Home Page D5 PERFORMANCE HORSES
Here are more PMU farms to peruse from ther NAERIC site-- NAERIC - North American Equine Ranching Council Foals PMU Foals Ranching America Ranchers and Canada Ranch Premarin