There are specific foods that can aid and support a healthy equine immune system. Stress, nutritional deficiencies, and aging can affect the appropriate functionality of the immune system. This can result in pathogens being able to breach the defense systems of the body.
Stress: can come from environmental factors, chronic conditions such as ulcers, as well as competitions, shipping, injuries, lay up, metabolic imbalances, and daily training.
Nutritional deficiencies: can result from not enough forage and hay, as well as low-quality hay. Deficiencies can also occur when feeding processed feeds if the recommended amount per day is not fed. Some nutritional deficiencies are a result of metabolic issues such as PSSM, EPSM, and HYPP.
Age: older horses can have weaker immune systems due to the aging process.