Definitions and General Information
Laminitis is the inflammation of the laminae or laminated tissue structure to which the hoof is attached. Clinical signs include foot tenderness progressing to inability to walk, increased digital pulses, and increased temperature in the hooves.
This inflammation can be triggered by an excess of sweet, rich spring grass, chemical wormers, vaccinations or too much grain in the diet – an excess of “sugars” with little roughage and can cause deterioration of hoof attachment and result in extreme lameness, excruciating pain and a disruption of normal circulation.
Founder – untreated laminitis can lead to Founder which is where the bone rotates within the hoof capsule and sometimes results in the bone penetrating the sole.
Navicular Syndrome often called Navicular disease, is a syndrome of soundness problems in horses. It most commonly describes an inflammation or degeneration of the navicular bone and its surrounding tissues, usually on the front feet. It can lead to significant and even disabling lameness.
Horses with a high weight-to-foot-size ratio may have an increased chance of exhibiting symptoms of Navicular Syndrome, since the relative load on the foot increases. This might explain why Navicular Syndrome is seen more frequently in Thoroughbreds, American Quarter Horses, and Warmbloods as opposed to ponies and Arabians.