White line disease is a painful condition that lasts anywhere from a few weeks to several years. The horse may experience intense pain at night or in the early morning hours. This is often the time when the horse is most restless and the hoof is most painful.
The first sign of white line disease is a sudden onset of lameness with a swollen, red, painful hoof. The horse may also show signs of pain, fever, and an inability to eat or drink. In severe cases, white line disease may cause a horse to lose its appetite, become lethargic, and show signs of depression.
White line disease usually involves one or more hooves. Therefore, it is important that you examine each hoof carefully for any abnormal signs or symptoms. If you notice anything unusual about any of your horse’s hooves, please consult with your veterinarian or a hoof care professional immediately.