Christa Lesté-Lasserre, MA

Passionate about horses and science from the time she was riding her first Shetland Pony in Texas, Christa Lesté-Lasserre writes about scientific research that contributes to a better understanding of all equids. After undergrad studies in science, journalism, and literature, she received a master’s degree in creative writing. Now based in France, she aims to present the most fascinating aspect of equine science: the story it creates. Follow Lesté-Lasserre on Twitter @christalestelas.

Articles by: Christa Lesté-Lasserre, MA

Training: Positive Reinforcement Improves Horse Memory

The research team that demonstrated yearlings perform much better if their training included feed rewards as positive reinforcement is now back to let us know that positive reinforcement gets engrained in young horses’ minds for the long ha

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Pregnant Mare Exercise: No Negative Effect on Fetuses in Study

Some of us tend to think we should keep a broodmare’s physical efforts down to a minimum. But new research shows the heart rates of 9-month-old fetuses remained unchanged during and after maternal exercise. Furthermore, plasma cortisol and plasma lactate concentrations were lower for the pregnant mares than for the same mares post-partum for the same exercise tests. These results indicate that the

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German Competition Horse Medication Policies Revised

Getting away with doping in equestrian events is about to become even harder for equestrians practicing in a country recognized worldwide for its horsemanship.

The German Equestrian Sports Federation (FN) has announced new regulations to control doping, both in and out of competition, with reinforced sanctions, intensified monitoring, and a specific list of 70 forbidden substances

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Freeze Stops European Atypical Myopathy Reports

The largest outbreak of equine atypical myopathy in Europe has ended with freezing winter temperatures, with a record number of 371 reported cases, according to a group of researchers in Belgium.

Atypical myopathy causes severe generalized weakness and stiffness, often ending in death. Urine becomes coffee-colored, and blood workups show significant increases i

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Equine Grass Sickness Reviewed

A fatal gastrointestinal disease once limited to Scotland is being seen more frequently in certain parts of the world due to geographical progression, said British researchers.

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Norwegian Rider Disqualified from Beijing Olympics

Norwegian equestrian Tony Andre Hansen and his 2008 Olympic mount, Camiro, have been definitively disqualified from the Beijing Olympics for a medication offense. The disqualification followed an appeals commission decision handed down Dec. 4.

Hansen’s appeal of the 2008 ruling of the Fédération Equestre International (FEI) was dismissed last Friday by the Court

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Horses Demonstrate Ability to Count in New Study

It’s no circus trick: researchers have shown that horses can count, despite 100 years of belief to the contrary.

By dropping apples one by one into two buckets, researchers determined that horses almost always chose the bucket with more apples, if the numbers were low (less than four). The horses chose randomly between buckets of four and six apples.

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Study: Topical Allergy Cream Can Produce Systemic Effects in Horses

Glucocorticoid cream applied at normal doses onto healthy equine skin will be quickly absorbed into the body"s system and can generate adverse systemic effects, said German researchers in a new study report. As a result, it can also cause a horse to test positive in performance drug tests within two days. When used to treat allergic skin reactions, glucocorticoids are

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Mares’ Social Bonds Might Enhance Reproductive Success

Mares that form close social bonds with other mares have improved pregnancy, foal birth, and foal survival rates, said a group of researchers studying wild herds in the North Island of New Zealand. The mares’ enhanced reproductive success appears to be linked primarily to mutual protection from harassment by stallions, they said.

Unlike most other mammal groups, the mares were

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Study: Horse Whinnies Packed with Information

Through their whinnies, horses convey specific information about their identities, including sex, height, and weight, according to French researchers. Acoustic analyses of whinnies and the reactions of horses to various recorded whinnies also suggest that the vocal calls play an important social role and appear to be unique to each horse.

This is the first study of its kind in horses,

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West Nile Virus Returns to Italy

West Nile virus (WNV) has re-emerged in Italy, resulting in 28 equine clinical cases, including seven deaths as of last week, according to an epidemiological bulletin produced by the Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise “Giuseppe Caporale” (IZSA&M), an Italian public health institute.

The epidemic began in central eastern Italy in August, in the same

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