Sharing the perspectives and experiences of researchers at the Clinical Endocrinology Laboratory at the University of California-Davis, Megan Arszman covers the gamut regarding spaying of female horses in this article. Sudden changes in a horse’s behavior or performance can be many things besides hormones, explain the researchers.
Source: The Paulick Report, March 15, 2024. <Link>.
The reason that spaying is not that common in horses is that intact horses don’t show heat signs similar to dogs and cats . . . and there are not that many undesired behaviors related to female reproductive cycles in horses.”