The age at which a horse becomes a senior depends on the individual horse because some age more gracefully than others. By the time a horse reaches its late teens or early twenties, it is safe to say it is becoming an aged horse. However, many horses can be much older and show very few signs of aging. A nutritionist does not designate a horse as a senior until it is unable to eat its normal diet and maintain the desired body condition. Once a horse is unable to sustain itself on a normal diet, one that has maintained the horse for years, dietary changes and occasionally environmental and medical changes are necessary to keep the horse healthy.
