PMU not the uterus. . Pregnant Mare Urine. They are stalled, and a large bag attached to their behinds,
it collects the urine. It is then collected. They only get a break when foaling and nursing, and then back on then line they go. There are some mares that have been broke/trained, as these PMU farms went all over buying up mares when there was a lot of farms. I had 2 pmu mares, one is still here, the other was put down as she was dangerous, seriously dangerous. I have the filly, now mare, from the one that was put down, and she is sweet as pie. The other mares foal died, it was septic, born very ill and after a grand spent trying to save him, he died.