Haylie Pfeffer

Haylie Pfeffer, Digital Editor, holds a degree in equine studies with a concentration in communications and a minor in social media marketing. She is a Pennsylvania native and, as a horse owner herself, has a passion for helping owners provide the best care for their horses. When she is not writing or in the barn, she is spending time with her dog, Clementine.

Articles by: Haylie Pfeffer

Barbaro Remains Stable

Chief of Surgery Dean Richardson, DVM, reports today (July 15) that Kentucky Derby winner Barbaro had a very good night and remains in stable condition at the University of Pennsylvania’s George D. Widener Hospital.


?His heart rate and

Read More

Strangles Vaccines and Immunity to Streptococcus equi

Equine strangles is caused by Streptococcus equi, a biovar, or clonal descendent of an ancestral S. zooepidemicus. Recovery from the disease is accompanied by onset of acquired resistance to the disease in approximately 75% of horses, an immunity that persists for 5 years or longer — hence the greater incidence of strangles in younger horses.

Read More

Barbaro’s Condition “Stable” Friday

Kentucky Derby winner Barbaro spent a restful night and his condition is stable, according to Dean Richardson, DVM, Dipl. ACVS, Chief of Surgery. At a news conference yesterday, Richardson announced that the three-year-old colt has laminitis.

Read More

Fans Root for Barbaro’s Recovery

The roses on the lobby table were addressed to “Mr. Barbaro Jackson” and the card said best wishes to a champion horse.


One girl and her family drove more than an hour to deliver a homemade get-well note and to let Barbaro know they were

Read More

Canadian Anthrax Outbreak Worst on Record

Saskatchewan, Canada, is experiencing its worst anthrax year on record. Animal health authorities have quarantined more than 28 premises in Saskatchewan for suspected anthrax contamination and have deemed 113 cattle deaths suspicious as of July

Read More

Clone of Champion Show Jumper Born

Researchers announced yesterday (July 12) the birth of a clone of the Warmblood show jumping champion E.T. The colt, named E.T.Cryozootech-Stallion, was produced to give breeders the opportunity to further the 20-year-old gelding’s line. The col

Read More

Researchers Contemplate Role of Vesiviruses in MRLS

Oregon State University (OSU) researchers announced last month that they linked vesiviruses to abortions seen during Central Kentucky’s bout with mare reproductive loss syndrome in 2001 and concluded that vesivirus-specific reagents should be

Read More

Drug Resistance of Equine Internal Parasites

This is an excerpt from Equine Disease Quarterly, funded by underwriters at Lloyd’s, London, brokers, and their Kentucky agents.


The main internal parasites traditionally considered to be important in horses are bots,

Read More

More From The Horse

senior horse; old horse; old; senior; keeping senior horses happy
060_thehorse-vet_2025
Horse Eating Hay
knee flexion, lameness exam

Stay on top of the most recent Horse Health news with

FREE weekly newsletters from TheHorse.com

Sponsored Content

Weekly Poll

sponsored by:

What is your biggest challenge when caring for horses in hot weather?
74 votes · 74 answers

Readers’ Most Popular

The Horse
Privacy Overview

This website uses cookies so that we can provide you with the best user experience possible. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful.