09/30/2026
Pain and Behavioral Change PART 1
When an owner starts to notice a change in their horse's behavior, the first step should involve a conversation with their veterinarian. Pain and behavioral change are often synonymous due to the extensive process that inflammation has on a horse's body.
Recently attended CE at Fetch DVM 360 with Dr. Michale Petty, (a veterinary pain management specialist) titled "When Pain Talks Through Behavior: Seeing beyond the growl, hiss or hide", discussed an often overlooked correlation between pain and behavior change. Recent changes such as a sudden lameness or hives, or even long term chronic states of inflammation, such as arthritis, muscle or nerve pain, or also in many cases, dermatology discomfort including pruritic (itchy) dermatitis, can cause significant discomfort in animals leading them to states of hypervigilance and changes in social patterns. This can include social avoidance, bolting, kicking, biting, tail swishing, running off pasture mates, etc. (Although Dr. Petty's specialty is small animals, this concept applies to horses, too.)
During the discussion, Dr. Petty referenced dogs or cats that might be socially avoiding the owner or other pets in the house because they don't feel good, waking up during night and reacting at sounds that they may have heard a hundred times earlier that day, because at night, their state of inflammation can be heightened. They may appear to have a shortened fuse for patience with their fellow pets in the home or their owners (often growling, snapping), and that can be due to increased emotional stress on the body when they are living in a state of chronic inflammation. (Petty, 2026).
Where's the correlation in horses? If we consider chronic arthritic changes, foot soreness, rain rot inflammation or sweet itch, gastric ulcers, kissing spine, etc., these conditions can make horses feel frustrated, sore, and it can heighten their overall senses which are already working hard being a prey animal and preparing for fight or flight at a moment's notice. This can make them more sensitive to noises or touch, certain textures of blankets, tight girths, not wanting to stand around other horses in the herd they might not get along with, going out on new trails as it might be scarier since it's unknown and brings physical tension on top of inflammation as well as emotional fear. Buddy sourness can be a VERY common symptom because there is safety in the herd and that allows them to relax some of their senses while not feeling well while being in the group setting. High releases of cortisol that occur in emotionally distressed situations such as pain and inflammation, fear or extreme emotional distress, makes memory recall and learning skills challenging, and in some cases, impossible. The body is preparing to flee, not learn. Changes in being willing to participate in riding, ground work, or even manners...... should always involve veterinary intervention.