Original ResearchPublished 9 October 2026Antinociceptive effects of subcutaneous butorphanol administration in healthy horsesT. M. Masters · C. De Gennaro · S. L. Messer · J. L. Khatib · R. A. Moura · M. F. Mallicote · L. ChiavacciniFrontiers in Veterinary Sciencedoi 10.3389/fvets.2026.1970768