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Articles ( * = TheHorse.com members only )Date Posted
LSU Equine Drug Testing Lab Receives Racehorse Contract Extension   *
The Louisiana State University School of Veterinary Medicine’s Equine Medication Surveillance Laboratory (EMSL) has received a three-year extension of its contract with the Louisiana State Racing Commission to provide drug testing of racehorses in the State. Established in 1987, the EMSL performs all equine drug testing for the Louisiana State Racing ... Read full story
 9/17/2009
Dr. Thomas Tobin Receives National Industry Service Award   *
University of Kentucky Gluck Equine Research Center's Thomas Tobin, MRCVS, PhD, Dipl. ABT, was named co-recipient of the National Horsemen's Benevolent and Protective Association (HBPA) 2008 Industry Service Award at its annual meeting July 3 in Shepherdstown, W. Va. Tobin and Kent Stirling, executive director of the Florida HBPA, were co-honored for ... Read full story
 7/14/2009
Racehorse Drug Test National Lab Standards Set   *
New national laboratory standards for racehorse drug and medication testing, the implementation of a laboratory accreditation program, and a new independent Equine Quality Assurance Program have been established by the Racing Medication and Testing Consortium board of directors. In addition, at the June 18 meeting in Baltimore the board approved ... Read full story
 7/6/2009
Racehorse Medication Policies to be Focus of Jockey Club Speech   *
The need for international harmonization of racehorse medication rules will be the topic of the keynote address at The Jockey Club's 57th annual Round Table Conference on Matters Pertaining to Racing. Louis Romanet, chairman of the International Federation of Horseracing Authorities (IFHA) will present the topic at the Gideon Putnam Resort in Saratoga ... Read full story
 6/30/2009
Pennsylvania Racing to Regulate Corticosteroids   *
The Pennsylvania Horse Racing Commission has adopted a policy whereby administration of corticosteroids in horses must be stopped seven days prior race day. The regulation takes effect June 1, according to a policy directive signed May 4. The PHRC unanimously voted for the regulation April 15. Corticosteroids--those commonly used in horses include ... Read full story
 5/7/2009
AAEP 2008: Anabolic Steroid Testing in a Racing Environment   *
Current public consensus on the subject of steroid use in horses is different from that of 20-30 years ago. At the 2008 American Association of Equine Practitioners convention, held Dec. 6-10 in San Diego, Calif., Keith Soring, DVM, discussed testing for anabolic steroids. Now regulators, chemists, veterinarians, breeders, and owners recognize that ... Read full story
 5/3/2009
Steroid Test Identifies Hermaphroditic Filly  *
Year-and-a-half-old testing for anabolic steroids in racehorses produced some unusual results--including the discovery of a Standardbred filly that's actually a male. In Pennsylvania, tests showed a high elevation of testosterone in Arizona Helen, who was raced at the harness track Harrah's Chester Racetrack and Casino, officials said April 23 during ... Read full story
 4/24/2009
Glucosamine in a Cushing's Horse?
Q: As soon as my 20-year-old gelding was diagnosed with Cushing's disease, I eliminated glucosamine from his diet. However, he appears to have become gradually and increasingly stiff and short-strided without it. I really think that it helped him, and I'd love to put him back on the supplement if I could safely do so. Based on current thinking, would ... Read full story
 12/1/2008
Anabolic Steroids or Confidence?  *
Q: In reading the article by Dr. McDonnell about the effects of anabolic steroids on geldings and their behavior, I wondered how long the effects last after the steroids are given to the horse. I have a 3-year-old off-the-track Thoroughbred at home recovering from illness, and he is not the same sweet gelding I sent out for training. Even something ... Read full story
 11/1/2008
Problem Breeder Mare  *
Getting mares in foal sometimes can be a tall task. What do veterinarians involved with reproduction have in common with the fictitious Sherlock Holmes? Both play the role of detective in solving mysteries. With Arthur Conan Doyle's legendary character, the mystery generally involved identifying the perpetrator of a crime. With the reproductive veterinarian, ... Read full story
 4/1/2008
Virginia: Free Pre-Race Steroids Tests  *
The Virginia Racing Commission will offer free pre-race testing for anabolic and androgenic steroids in horses that race at Colonial Downs this year. The commission, at its March 19 meeting, unanimously adopted regulations and penalties for steroids in racehorses. The regulations will be in place by the end of April and prior to the June 6 opening ... Read full story
 3/22/2008
Racing Medication Group Moving Ahead with Steroid Work  *
The Racing Medication and Testing Consortium (RMTC) will hold its spring board of directors meeting March 25 in conjunction with the Association of Racing Commissioners International annual convention in Austin, Texas. The RMTC will receive an update on regulation of anabolic steroids from its Scientific Advisory Committee, and also participate in ... Read full story
 3/20/2008
Pennsylvania Racehorse Test Results: 98.8% Steroid-Free   *
Nearly all of the more than 2,000 samples tested for anabolic steroids in Pennsylvania racehorses during a two-month period came back negative, state officials said March 4. A model rule for regulation of steroids in Pennsylvania will be enforced beginning April 1. The Pennsylvania Horse Racing Commission and Pennsylvania Harness Racing Commission ... Read full story
 3/5/2008
Anabolic Steroid Effects  *
A colleague, Larry Soma, VMD, is an anesthesiologist/pharmacologist who conducts research for the Thoroughbred and Standardbred horse racing commissions in Pennsylvania. Basically, his lab develops and validates testing methods for detection of illegal drugs in horses. Recently, Dr. Soma and I crossed paths in the clinic parking lot as we rushed between ... Read full story
 11/1/2007
Healthy Horses: Endocrine System Function and Flaws  *
Horses suffer from few endocrine disorders compared to humans and companion animals; however, they're not totally off the hook, explained Emily Graves, VMD, MS, Dipl. ACVIM, of Michigan State University, to horse owners in attendance at the Healthy Horses Workshop held in Ft. Collins, Colo., on July 28. The endocrine system is a very complex system ... Read full story
 9/25/2007
Hormone and Drug Use in the Stallion  *
Many hormone and drug treatments could have a negative impact on the endocrine system, so it's best to avoid using them altogether in the breeding stallion. However, Sue M. McDonnell, PhD, Certified AAB, of the University of Pennsylvania's School of Veterinary Medicine, said that there are some stallions and situations where carefully selected and ... Read full story
 2/1/2007
Induction of Lactation in the Non-Pregnant Mare  *
Poor milk production or the loss of a mare in the peripartum period (occurring in the last month of gestation or the first few months after delivery) can jeopardize the health and viability of the foal. To provide the foal with an alternate source of milk, the horse owner might opt to hand-rear the foal using a milk replacement formula, or pair the ... Read full story
 2/1/2007
Dopamine and Its Evil Twin Ergovaline   *
In the horse, the hormone dopamine exerts a number of effects through its actions on the pituitary gland. Both dopamine and ergovaline, a dopaminergic agonist (a drug that stimulates dopamine receptors), can significantly impact the mare's reproductive cycle, said Valerie J. Linse, MS, DVM, of Hagyard Equine Medical Institute, during her presentation ... Read full story
 2/1/2007
Cushing's Disease in Horses  *
It's spring, yet your aging equine has failed to shed his long, shaggy, winter coat. Furthermore, he's developed a saggy belly coupled with loss of muscle over his croup and rump. He's gulping down far more water than he used to, and his stall is always wet. All these are the classic signs of pituitary pars intermedia dysfunction (PPID), more commonly ... Read full story
 3/1/2006
A Closer Look at Insulin   *
When you think of insulin, you might think first of humans and diabetes. But horses have insulin, too, as well as insulin-linked health issues. In fact, this is an area being touched on by researchers in multiple fields, from behavior to laminitis to exercise physiology. In this article, experts share their insights on what's known about insulin, what's ... Read full story
 4/1/2005
Metabolic Syndrome and Obesity in Horses
Equine nutritionists and wise horse owners have long known that obesity in horses is not a good thing. The obese horse often is incapable of performing even moderate tasks without becoming exhausted and, as a result, placing itself in danger of injury. Now researchers are adding still another dimension to these concerns. That dimension involves laminitis ... Read full story
 3/3/2005
AAEP Convention 2004 Wrap-Up: Reproduction  *
Pregnancies from Euthanized Mare Ovaries "You think breeding mares on foal heat is tough, try dead mares!" said Elaine Carnevale, DVM, PhD, professor in equine reproduction in the department of biomedical sciences at Colorado State University (CSU), with a laugh as she began her talk following a presentation on foal heat breeding success. Her presentation ... Read full story
 3/3/2005
AAEP Convention 2004: hCG and Ovulation  *
Managing a mare's estrous cycle is an integral part of breeding management, and human chorionic gonadotropin (hCG) is one hormone option for doing just that. Patrick McCue, DVM, PhD, Dipl. ACT, associate professor of equine science at Colorado State University, discussed the use of hCG to manage ovulation. "Most of us have used hCG throughout our ... Read full story
 2/14/2005
AAEP Convention 2004: Reducing Drug Costs and Side Effects of Prostaglandins  *
A major use of prostaglandin is to manipulate mares' estrous cycles. A veterinarian's most commonly used prostaglandin treatments are usually Lutalyse (dinoprost tromethamine or PGF2) and the prostaglandin analogue (a similar compound) Estrumate (cloprostenol or CLO). Some side effects observed when mares are treated with labeled doses of these medications ... Read full story
 2/14/2005
AAEP Convention 2004: Medicine II--Thyroid/Cushing's Disease  *
Babretta Breuhaus, DVM, PhD, associate professor of equine medicine in the department of clinical sciences at North Carolina State University, provided a review of thyroid function and dysfunction at the 50th annual American Association of Equine Practitioners (AAEP) Convention in Denver, Colo., Dec. 4-8, 2004. Hypothyroidism (underactivity of the ... Read full story
 2/14/2005
AAEP Convention 2004: Hormone Therapy in the Mare  *
This discussion at the 50th annual American Association of Equine Practitioners (AAEP) Convention in Denver, Colo., Dec. 4-8, 2004, was presided over by Patrick McCue, DVM, PhD, Dipl. ACT, associate professor of equine ambulatory medicine at Colorado State University, and Dean Neely, VMD, PhD, of New Jersey. It was a wide-ranging discussion, with the ... Read full story
 2/14/2005
Plaintiff Would Cooperate in Saddlebred's Exhumation  *
The owner of the ranch near Versailles, Ky., where an American Saddlebred was buried after brutal attacks led to his eventual euthanasia, has expressed in court documents that she would cooperate with requests that the horse's body be exhumed if the horse were to be reburied at her farm and other conditions were met. Additionally, the lawyers of both ... Read full story
 10/15/2004
Recurrent Colic Q&A  *
My horse has recurrent colic that's usually fairly mild, but she had surgery last August due to a twist. She has done well until recently when she had another mild attack. A biopsy taken during surgery showed inflammation. No other problems were discovered. Since the last attack, my veterinarian wants to treat her permanently with a low dose every ... Read full story
 3/1/2004
eFSH for Superovulation  *
Colorado State University's Ed Squires, PhD, an honorary Diplomate in the American College of Theriogenology (reproduction), presented several lectures at the 2003 American Association of Equine Practitioners convention. One presentation was on using a new commercially available product called equine follicle-stimulating hormone (eFSH, from Bioniche ... Read full story
 2/3/2004
Regumate to Control Stud Behavior?
Q: My yearling stallion has begun his show career in longe line classes. He is beginning to lose concentration and act "studdy" at shows. It was suggested that I put him on Regumate to help control this behavior (as an alternative to gelding). What are the pros and cons? Jennifer A: Altrenogest (brand name Regumate) is a synthetic progestin ... Read full story
 2/1/2004
Multiple Ovulations   *
Colorado State University's Ed Squires, PhD, an honorary Diplomate in the American College of Theriogenology (reproduction), presented several lectures at the 2003 American Association of Equine Practitioners convention. One presentation was on using a new commercially available product called equine follicle-stimulating hormone (eFSH, from Bioniche ... Read full story
 2/1/2004
Optimizing Implant Therapy in Cycling Mares   *
Deslorelin acetate implants (Ovuplant from Fort Dodge Animal Health) have proven highly successful at inducing ovulation in mares. Implanted mares typically ovulate within 48 hours. Unfortunately, despite administration of prostaglandin during diestrus, a percentage of mares with implants, perhaps as many as 1 in 4, experience a prolonged interval ... Read full story
 1/1/2004
Steroid Effects on the Knees   *
During intensive training, young racehorses experience a thickening in the layers of bone under the cartilage of joints. These layers, called subchondral (located nearer the surface) and cancellous, become harder and better able to handle the rigors of training. Unfortunately, the process is painful, especially in the carpus (knee). Therefore, it is ... Read full story
 10/1/2003
She Ain't What She Used to Be   *
The aging process takes its toll in many ways on horses and humans. When women reach a certain age, for example, they experience menopause, a transitional period when Nature serves notice that they no longer can bear children. With horses, that stage of life is less pronounced, with some mares capable of bearing foals almost up to the time of death. ... Read full story
 8/1/2003
Blood Test for Ovarian Tumors   *
Granulosa-theca cell tumors (GTCTs) are usually tentatively diagnosed by rectal palpation and ultrasound examination after an owner complains of poor performance or aggressive, sexual, stallion-like behaviors. However, the diagnosis can't be confirmed unless an exploratory laparotomy is performed and the tumor is biopsied (or removed and sectioned ... Read full story
 3/1/2003
No Live Foal Guarantees  *
Subconsciously, you've been holding your breath for months. From the moment your mare was confirmed in foal, it's been a tense waiting game. And although she will be foaling soon, you know a healthy foal is still anything but a given. Between breeding and her foaling date lurk a few dozen tragic ways in which she could lose her foal. Whether you call ... Read full story
 2/1/2003
Bluegrass Equine Reproduction Symposium: Environment and Hormones  *
A wide range of reproduction topics specific to stallions, mares, and foals were discussed at the Bluegrass Equine Reproduction Symposium Oct. 23-26 in Lexington, Ky., sponsored by Hagyard-Davidson-McGee. Following are reports of a few topics; more can be seen online in the Bluegrass Equine Reproduction Symposium category under Convention Reports at ... Read full story
 1/1/2003
Luteal Insufficiency in the Mare  *
Insufficient function of the corpus luteum (the structure formed after the follicle that releases the egg, or ovulates, and then produces progesterone) has been proposed as a mechanism for early embryonic loss in the mare, but until now there hasn't been much research into this potential phenomenon. In her presentation "Luteal Insufficiency in the ... Read full story
 11/8/2002
Environmental Effects on Hormone Activity  *
Some compounds present in the environment, both from natural and man-made sources, can disrupt the delicate hormone balance necessary for reproduction in several species possibly including horses, according to Cynthia Corbitt Gulledge, PhD, of the University of Louisville’s biology department. Gulledge presented “Hormones and Anti-Hormones in the Environment: ... Read full story
 10/31/2002
Bluegrass Equine Reproduction Symposium: Stallions  *
A four-day seminar focusing on reproduction education for veterinarians was hosted by Hagyard-Davidson-McGee veterinary firm in Lexington, Ky., Oct. 23-26 This is the fifth year for a fall seminar hosted by the group, which now alternates with a critical care symposium in odd-numbered years. The first day offered a series of wet labs on pathology, ... Read full story
 10/30/2002
Acupuncture and Microdose Prostaglandin in the Mare  *
Prostaglandin F2 alpha (PG) is used to shorten a mare's cycle and hasten ovulation for breeding. Unfortunately, the standard PG dose (5 mg) also causes undesirable side effects, including sweating, trembling, increased heart rate, and even signs of colic. There is growing interest in devising a method to use less PG and reduce side effects. However, ... Read full story
 5/1/2002
AAEP Convention 2001: General Medicine   *
Hormone Responses to Feeds Joe Pagan, PhD, owner of Kentucky Equine Research in Versailles, Ky., discussed glycemic response in growing horses as an indicator of developmental orthopedic disease. He said looking at diet and skeletal disease was nothing new--a study done at The Ohio State University (presented at the 1985 AAEP convention) changed ... Read full story
 2/1/2002
Ovulation  *
There is a rhythm to nature. Season follows season, with each having a specific purpose to serve in the grand scheme of things. There is a time for planting, a time for growing, a time for harvesting, and a time for resting to prepare for the cycle to be repeated. It is much the same with reproduction in the horse. Equine reproduction follows the ... Read full story
 11/1/2001
Mating Mares Q&A  *
Readers ask questions of equine reproduction experts Earlier this year, The Horse made a request to its Horse Health E-Newsletter subscribers: What questions do you have for specialists about breeding your mares? Our e-mail boxes were flooded with replies. After narrowing questions down to several themes to be featured in this article, the questions ... Read full story
 11/1/2001
Reproductive Challenges: Barren Mares  *
The anticipation and jubilation surrounding the arrival of the first foals of the new year have come for many of us. It is interesting how transient that celebration is. In fact, we are applauding Mother Nature and the victories of last year's early breeding endeavors and realize the next contest is about to begin anew and in earnest. We have a fresh ... Read full story
 10/16/2001
Ovuplant: Improving the Odds  *
If you're a breeder, frankly, it pays to be in the livestock business. Cattle, sheep, goats, and pigs all make life easy for those trying to produce young stock--they are all "facultative-induced ovulators," meaning that matings early in their estrous periods can accelerate their rate of ovulation. In practical terms, this means you can easily calculate ... Read full story
 10/15/2001
Superovulation  *
In the continuing effort to increase the fertility of horses there comes a new weapon--superovulation. Inducing a mare to ovulate multiple oocytes can translate into producing more foals from selected females. Assisted reproductive technology can help solve the problem of how to increase the number of foals from a valuable mare, or how to obtain a ... Read full story
 10/11/2001
Oxytocin and Maternal Recognition of Pregnancy  *
A research report from the laboratory at the Gluck Equine Research Center at the University of Kentucky noted that it is well-established that early conceptus loss (the embryo and its associated extra-embryonic membranes) is a major source of reproductive inefficiency in domestic animals. Early pregnancy in all mammals is characterized by a high fertilization ... Read full story
 10/3/2001
Lower Airway Disease  *
Coughing, one of the most common signs of respiratory disease, can occur in response to irritation from viruses, bacteria, or inhaled environmental dusts and allergens. However, most veterinarians and researchers will agree that irritation from the dusts in feed and bedding is the most common cause of coughing. In the worst case, this irritation can ... Read full story
 10/1/2001
Joints Part 2: Joint Disease  *
Among the most highly engineered, finely tuned machines built by man are race cars that zip around the Indianapolis 500 track at speeds in excess of 200 miles per hour. However, even the most perfectly constructed car will develop problems from continued competition. It is much the same with the performance horse and his joints. Even with perfect construction ... Read full story
 9/1/2001
A Nose for News--Equine Sense of Smell  *
A mare lies in the straw, devotedly licking dry her newborn foal. As she does so, she breathes deeply of the baby's scent, memorizing it so that ever after she can identify the foal as hers out of the herd. A young gelding being turned out with a group for the first time trots optimistically towards his new pasturemates. Out of the herd swaggers ... Read full story
 2/1/2001
Joint Supplements Controversy  *
In this issue, we discuss one of the hottest, and most controversial, areas of supplementation on the equine market--glucosamine, chondroitin sulfate, and other oral supplements for horses with signs of osteoarthritis or degenerative joint disease. These products are among the most successful classes of nutraceutical supplements currently available ... Read full story
 11/1/2000
Short Cycling Mares  *
Nature has done a commendable job in developing the equine reproductive system, but it did not take into consideration man's special needs for the production of horses at certain times or under specific circumstances. The first man-made rule for some breeds involved birth dates. People decided for some registries that every equine was a year older ... Read full story
 5/1/2000
Mare Madness  *
I hear it all the time: "My mare is impossible whenever she is in heat, and, in fact, she's in heat most of the time!" or "Every time I want to do something with my mare, she's in heat; in fact, she was in heat for every single show last year!" or "My mare has a split personality--most of the time she's a witch. Every couple weeks she's in season, ... Read full story
 4/1/2000
Mares Which Fail To Show Estrus  *
During her heat cycle, a mare typically and obviously demonstrates estrus when in the presence of a stallion by flirtatious behavior and physical changes of her genitalia. However, many natural factors -- as well as disorders -- can affect the estrous cycle and the mare's ability to show heat. Pregnancy, lactating anestrus, winter anestrus, behavioral ... Read full story
 1/1/2000
Steroids
Q: My horse had a soft tissue injury and my veterinarian gave him steroids. Some of the people in my barn say I need to be careful that he doesn’t get too aggressive or get foundered. I’m confused. How can steroids do all of that? A: The steroids, an extremely broad category of drugs and natural hormones, have a wide variety of effects on the ... Read full story
 7/1/1999
Early Embryonic Death  *
For all horse breeders, it is important to realize that not every mare will give birth to a live foal. Failure of the pregnancy can occur at any stage starting from the fertilization of the oocyte or egg. The oocyte develops in the fluid- filled follicle (Figure One). When it is mature, the oocyte is shed from the follicle into the fallopian tube. ... Read full story
 3/1/1999
Regulating Estrus  *
When a mare is left to her own devices reproductively, she will fall into a rhythm with Nature. When the days are short, dark, and cold, her reproductive system will shut down. When the longer, warmer days of spring arrive, her reproductive system will begin to stir and within weeks will be ready for procreation. BARBARA D. LIVINGSTON Exercise ... Read full story
 12/1/1998
The Sub-Fertile Stallion  *
Having a stallion on the premises adds another dimension to an equine operation whether it be on a farm where only a few mares are bred each year or one where that number is in the hundreds. LEE SCHUYLER ILLUSTRATION The master or controlling organs of a stallion's reproductive system are the testes. Within their confines, spermatozoa are ... Read full story
 3/1/1998
Sub-Fertile Mares  *
A broodmare which fails to conceive or carry a foal to term can be an emotional and financial liability. For the backyard breeder, the liability might be primarily emotional, when that special mare you wanted to produce your next trail horse or hunter simply doesn't do so. For the commercial breeder, there might be emotional trauma, but more importantly ... Read full story
 2/1/1998
Estrous Cycle Primer  *
For all things there is a time and a season. Nowhere is this more true than in equine reproduction. Nature has established a definite time and season for mares to conceive and bear foals. It is a very sensible approach on the part of Mother Nature. The mare is most fertile and receptive to a stallion in the warming days of late spring and early summer. ... Read full story
 1/1/1998
He's Only as Old as He Feels  *
Advances in medicine and health care have boosted the average human life span from 45 years in the early 1900s to 72 or more years in the 1990s. Parallel advances in veterinary medicine, and horse owners' willingness to care for their horses beyond their utility, also have increased equine longevity. While most individuals are aware that humans are ... Read full story
 2/1/1997
Cushing's Disease Diagnosis  *
To many horse owners, it's just "old horse disease," and it's an affliction with a number of names--pituitary pars intermedia dysfunction (PPID), hyperadrenocorticism, ECD (equine Cushing's disease), and, most commonly, Cushing's syndrome. It can appear in horses as young as seven, but is most frequently found in horses which are geriatric. Whatever ... Read full story
 2/1/1997
Stallion Anatomy and Physiology  *
Breeding horses is a precarious business at best. Despite great strides in research, conception rates overall are not high. Some researchers place them as low as 55-60% of all mares bred. In many cases, blame is placed on the mare. She is too old, she has uterine cysts, scar tissue, abnormal perineal conformation, a malfunctioning endocrine system--and ... Read full story
 12/1/1996
Anatomy and Physiology of a Mare's Reproductive System  *
Moody. Inscrutable. Temperamental. Cantankerous. Mares seem to get tagged with such stereotypical labels. When your female equine displays inappropriate behavior, you might hear someone snort, "Typical mare!" Your mare's nature and individual behavior are influenced by hormones, which dictate events in her reproductive system. Whether or not you ever ... Read full story
 11/1/1996
Preventing Estrus In Performance Mares  *
It has happened to many horse owners. The day of the major event or stakes arrives and the prize mare is ready to compete. The night before her coat glistened, her muscles rippled, and her eyes were aglow with competitive spirit. This morning, when everything is on the line, there is a profound difference. Instead of bouncing on her toes when led ... Read full story
 5/1/1996




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