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when to collect his stallions’ semen. This allowed him to
maximize the opportunity to fertilize his mares.12
In the fall of 1996, Mr. Rinehart met Dr. John Allen, a
practicing veterinarian for 30 years and specialist in equine
reproduction.13 After some discussions, Mr. Rinehart decided to
have Dr. Allen work at the Campbell ranch. At this time, the
artificial insemination program included sonograms performed by
Dr. Allen. The sonograms allowed Mr. Rinehart to determine
better when the mares were ready for breeding and whether they
were pregnant. Since Dr. Allen joined Mr. Rinehart’s horse
breeding activity, the pregnancy rate of Mr. Rinehart’s breeding
program increased from a rate of 40 to 45 percent to a rate of 85
to 90 percent.
The Horse Breeding Activity’s Records
Mr. Rinehart maintained a ledger with handwritten monthly
expenses of the horse breeding activity until January 1994.
Starting in 1993, Mr. Rinehart began keeping records for the
horse breeding operation on a computer. Mr. Rinehart kept a
register report, cash-flow report, itemized category report,
12 Mr. Rinehart’s mares were in heat between 7 and 9 days.
The stallions’ semen lives only 48 hours after ejaculation.
Setting a schedule of when to collect semen and inseminate the
mares allowed him to maximize the chances of fertilization.
13 Dr. Allen’s expertise in equine breeding included such
areas as fertility, sterility, normal breeding management,
artificial insemination, and embryo transfers.
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Last modified: May 25, 2011