Breeding and Reproduction

Horse breeding from planning through foal care

KTA Sets Meeting for MRLS Loan Applicants

The Kentucky Thoroughbred Association (KTA) will offer a seminar July 25 to assist breeders in filling out loan applications for funding tied to mare reproductive loss syndrome. The money is available through a federal law enacted in

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Caterpillars Cause Late-Term Abortions

The University of Kentucky (UK) College of Agriculture today is releasing preliminary results from a collaborative project involving the UK Livestock Disease Diagnostic Center (Drs. Lenn Harrison, Manu Sebastian, and Deborah Williams), UK

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Does Ultrasound Give Clues to Abortion Cause?

Hagyard-Davidson-McGee veterinary associates worked with the University of Kentucky (UK)he latest project that has associated Eastern tent caterpillars (ETC) and mare reproductive loss syndrome (MRLS). Drs. Nathan Slovis and Thomas Seahorn, both

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Sheath Cleaning Frequency

Gray is a 22-year-old Quarter Horse gelding. My question is how/whether to clean his penis. When he lengthens it to urinate, I try to pick off the black crusty stuff, but it is somewhat unpleasant to do this.

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Update on the Eastern Tent Caterpillar

The newest study on early fetal loss and Eastern tent caterpillars (funded by the Grayson-Jockey Club Research Foundation) began on May 21 and was scheduled to continue for three weeks. The research is led by internal medicine specialist Bill

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Bringing Up Baby

Your young horse is growing up. From birth to age two, a horse will achieve 90% or more of his full adult height. But growing up too fast can cause problems, including an increased risk of developmental orthopedic disease (DOD), which includes which includes several skeletal problems in growing foals.

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MRLS Update: June 20, 2002

Farm Survey Results


As reported June 11, 2002, 92 Kentucky Thoroughbred farm managers responded to a questionnaire to estimate the 2002 early fetal losses (EFL). Based on data provided, 92.3% of mares on these farms bre

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Poison Control: Spraying Pastures with Insecticides

No definite cause of mare reproductive loss syndrome (MRLS) has been identified, but a recent discovery that Eastern tent caterpillars (ETC) can cause early fetal losses (and likely contributed to MRLS) has scientists at the University of

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AQHA Settles Embryo Transfer Lawsuit

The American Quarter Horse Association has eliminated all restrictions regarding the registration of foals produced through embryo transfer as part of an out-of-court settlement with a coalition of breeders.


For a couple of years, the

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Eastern Tent Caterpillars Cause Early Fetal Loss

A recent study funded by Grayson-Jockey Club Research Foundation, Rood and Riddle Equine Hospital, and several other entities, identified an association between the administration of starved Eastern Tent Caterpillars (ETC) and early pregnancy

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MRLS Monitoring Update

Report from Jimmy Henning, Extension Forage Specialist
Department of Agronomy
University of Kentucky College of Agriculture


Twelve horse farms and one hay farm are being monitored for several soil, pasture and

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Feeding Laminitic Broodmares

My best friend’s broodmare has unilateral laminitis (laminitis in one front hoof); she is a 19-year-old Quarter Horse and is currently five months pregnant. The concern is what to feed her to keep the foal healthy, and to keep her from suffering.

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