I moved from North to South and as a result (so many different influences) over time, both my horses developed laminitis and eventually (spring shots reaction in both) foundered badly. It takes 1 yr of health to fully regrow the hoof but the damage and fear of recurrence will remain throughout their life.
Here is some info from an ad for 'Laminil' which is copied with mention to Laminil taken out... https://www.horseforum.com/redirect-...p-laminitis%2F
Laminitis is an inflammatory response to stress. It’s simple and complex.
Like many diseases and conditions, laminitis occurs when an immune system response to stress goes wrong and starts a cascade of biochemical processes that cause inflammation and destruction of the foot. Mast cells play a key role in that cascade by releasing histamine and other inflammatory mediators, such as neutrophils, lymphocytes, and macrophages. These inflammatory agents, in turn, activate pro-inflammatory cytokines (cell-signaling proteins) that incite inflammation. Cytokines also inhibit growth factor receptors and the expression of genes involved in hoof growth and maturity. Thus, the inflammatory response both destroys cells and stops cell replacement.
A laminitis stressor can be a biological agent, environmental condition, or other external stimulus that causes stress to the animal. The animal responds to the stressor as a threat, which elicits the flight-or-fight immune system response that starts the laminitis cascade.
Laminitis stressors include grain overload, grass founder, equine metabolic syndrome, insulin resistance, colic, Cushings, Potomac Fever, retained placenta, steroids, vaccinations, concussion from work on hard ground, a long trailer ride, and accident.
In cases of grain, grass, and other environmental conditions, the stressor must be removed completely and immediately. The immune response and laminitis cascade will continue as long as the animal is exposed to the stressor, regardless of the quantity of exposure. Reducing the amount of the stressor will not stop the cascade.
In cases of hay laminitis where there has been no change in diet, the animal may have received too much forage and might be diagnosed as Equine Metabolic Syndrome or EMS, which is associated with obesity. Just reducing the amount of the same hay will not stop the laminitis process. The current hay has to be stopped immediately and completely. A different hay can be given in reduced amount.
Founder occurs when there is inflammation of the laminae (folds of tissue connecting the pedal bone to the hoof).
When there is inflammation and subsequently degeneration (as is seen in an interruption to the blood supply) of the laminae, laminitis results. The damage may be so severe that the pedal bone is no longer supported within the hoof and rotates toward and sometimes through the sole of the hoof.
When people say that the hoof "rotates", what actually is happening is the shrinking/dying of the laminae which hold the hoof wall onto the pedal bone. So instead of thinking of the hoof rotating, rather realize the it is actually sloughing and can slough off entirely; even with this terrible event, a horse can still "recover" with a lot of care.
Just a horrible health issue which is best caught as early as possible due to its life-long ramifications.
I hope this helps. Posted via Mobile Device