Wyeth-Ayerst home page for the company that manufactures Premarin.
Interesting point of view on why Wyeth-Ayerst would prefer that generics and synthetics not be acceptable. Has links to other information about estrogen:
Equine Advocates Premarin Page about premarin farms and alternatives - these are the folks behind the segment on Extra which was shown in February of 1998 and several other television news segments.
Information about a plant based estrogen supplements.
Cenestin - sponsoring the Warmblood Breeders' Fund
Information on substitutes for Premarin, ways to adjust diet, etc:
Premarin Alternatives and PMU Ribbons
This article from May of 1997 says that FDA investigation found "decision recognizes that at this time there can be no synthetic substitute for Premarin, a product made from a naturally derived blend of hormones."
Here's a page put out by the Alberta Agriculture Department on how to feed and water your PMU mares:
Have not been able to find a listing of the PMU Farms in Canada on the 'net using various search engines, but per the Alberta Agricultural site:
"Today 487 farms are found throughout Manitoba, Saskatchewan, Alberta and North Dakota. All producers are under contract to Ayerst Organics Limited, a division of Wyeth Ayerst Canada Inc."
Their site (Alberta's Agricultural) is at:
Alberta's Agricultural Information
Here's a site that has some information on the PMU mare breeding program:
NAERIC Home Page - NAERIC = North American Equine Ranching Information Council. According to their FAQ: "organization representing more than 450 professional equine ranchers who, in addition to their other agricultural activities, collect pregnant mares' urine (PMU) in North Dakota, Saskatchewan, Alberta, and Manitoba." Some interesting reading here from the POV of a PMU farmer. Take a look.
Premarin Foals for Adoption:
PMU Foal Quest finds homes across North America for Alberta PMU foals.
Taktani Foal Placement - Alberta, Canada. Will ship to the US.
United Pegasus Foundation in California does Premarin foal rescue and has them for adoption as does Ipswich Equine Rescue in Massachusetts (can no longer find their website and unsure if they are still active).