Conversations in Equine Science

This episode reviews a 2019 study where 23 horses were trained to use symbols to indicate whether they wanted a blanket put on, left on, or removed. Researchers tested horse choices across a range of temperatures, wind, rain, and seasons to see how weather and individual factors influenced blanket preference.Key findings: horses overwhelmingly chose blankets at very low temperatures (below −10°C/14°F) and tended to reject blankets above about 10°C/50°F, with most preferring no blanket around 20°C/68°F. Wind, precipitation, clipping, age, and individual variation also affected choices. The episode emphasizes observing each horse and adjusting blanketing to weather and the horse’s needs.

In this episode Nancy McLean checks into recent equine herpes cases and focuses on new research linking corticosteroid (triamcinolone) joint injections to insulin spikes and severe laminitis. They review the case of Fiona, a competitive mare who developed fatal laminitis after sacroiliac injections, and summarize ongoing studies at NC State funded by the Chromatic Fund.
The researchers are comparing single high-dose versus repeated low-dose steroid protocols, finding undiagnosed insulin dysregulation in many sport horses and recommending insulin testing before steroid treatments. The clinical study is expected to conclude by spring 2026.

This episode breaks down the current EHV-1 (EHM) outbreak in the U.S., covering clinical signs, transmission, and incubation periods.Listeners will learn about vaccine limitations, why quarantine and low-stress management matter, and practical biosecurity measures—cleaning, disinfectants (70% alcohol, hydrogen peroxide, chlorhexidine), and when to avoid bleach on dirty surfaces.Advice emphasizes keeping horses home when possible, monitoring for fever and limb swelling, and consulting your veterinarian for case-specific guidance.

Hosts Nancy McLean and Kate Acton discuss a 2025 study on how owner–veterinarian interactions affect recognition and management of pain in horses, using owners’ stories and vets’ perspectives to highlight subtle behavioral signs and practical decisions.
The episode emphasizes the importance of knowing each horse’s normal behavior, keeping compassionate communication open with veterinary teams, planning for aging horses, and making welfare-focused choices.
Research Link:
https://www.cambridge.org/core/journals/animal-welfare/article/owners-everyday-interactions-with-their-horse-painrelated-issues-and-those-of-veterinary-concern/8709217EEB13EFA934E783A03204E973?utm_campaign=shareaholic&utm_medium=email_this&utm_source=email

Nancy and Kate conclude their discussion on the current research and the Flying Lead Change book by Kelly Wendorf.
Sign up for the Kelly Wendorf clinic at the InStride episode page link.

Nancy and Kate discuss identifying and measuring the emotional states of horses.
Link to research: https://doi.org/10.1093/tas/txaf033
Book by Kelly Wendorf: Flying Lead Change.
Instride Podcast: https://podcasts.apple.com/us/podcast/in-stride/id1602148957

In this episode of Conversations in Equine Science, Kate and Nancy explore a compelling research paper titled "Retirement Risk Factors, Exercise Management, and Muscle Mass in U.S. Senior Horses" by Elisa Herbst. Published in May 2023, this paper dives into the intricacies of managing the health and exercise of senior horses in the U.S., examining factors such as retirement risk, exercise routines, and muscle mass preservation.
The hosts discuss key insights from an extensive survey involving over 2,700 respondents, highlighting the distinctions between equine professionals and hobby horse owners. They delve into the challenges faced by senior horses, such as sarcopenia and exercise management, drawing parallels with aging in humans while emphasizing the importance of physical activity and proper nutrition for maintaining muscle mass and overall health.
The episode sheds light on the significance of continued care and management as horses age, underscoring the role of dynamic mobilization exercises and hoof health in prolonging the vitality and quality of life of senior equines. Listeners are encouraged to consult with equine veterinarians and professionals before implementing changes based on this research.

This episode Kate and Nancy discuss a scoping review of 46 research papers on the effects of horseshoe type on equine gait.
Open Access Research Reference/Link:
Aoun, R., Takawira, C., & Lopez, M. J. (2025). Horseshoe effects on equine gait-A systematic scoping review. Veterinary surgery : VS, 54(1), 31–51.
https://doi.org/10.1111/vsu.14162

This week Kate and Nancy discuss rider back pain and it's association with 3 different stirrup lengths and 2 rider positions.
Research Reference:
Keener, Michaela M.1; Critchley, Meghan L.1; Layer, Jacob S.1; Johnson, Evan C.1; Barrett, Steven F.2; Dai, Boyi1. The Effect of Stirrup Length on Impact Attenuation and Its Association With Muscle Strength. Journal of Strength and Conditioning Research 35(11):p 3056-3062, November 2021. | DOI: 10.1519/JSC.0000000000003278
Link:
https://journals.lww.com/nsca-jscr/fulltext/2021/11000/the_effect_of_stirrup_length_on_impact_attenuation.12.aspx