There are only 26 farms in Canada now according to NAERIC. None in the US, and it has been that way for a while now, decade at least. There are also several similar drugs to Premarin out there, and there is evidence that China has PMU farms, although Pfizer says they are not owned nor controlled by them. NAERIC also states that Pfizer is not operating in China. Did find this article on PMU farms in China. PMU Horses—Killing Fields of Asia But just this summer, very young foals, left by themselves at auction near me, were needing rescue and the accompanying text said they had come from farmer here in MO and were PMU foals. Some said there were 200, I know one person was trying to find homes for 60 that were still left. The story was garbled at best, so I did some digging and found a rescue in MO that talks about the PMU foals and mares they rescue, brought in 1.3 million in donations for 2016. https://www.guidestar.org/FinDocuments/2016/205/168/2016-205168546-0ed110d5-9.pdf And this seems to be a growing trend too to raise money, and doesn't seem to have any basis in fact. Woman that lives near the rescue said she thinks it is fishy, as doesn't add up at all.