White line disease affects what part of the horse? Karin Livingston 10 years ago Earn the Mane-U Horse Health Badge! 1. White line disease affects what part of the horse?any white area on the horsethe gum line above the teeth an area just in front of the hoof's epidermal laminae the inner layer of the hoof wall Loading... {{#message}}{{{message}}}{{/message}}{{^message}}Your submission failed. The server responded with {{status_text}} (code {{status_code}}). Please contact the developer of this form processor to improve this message. Learn More{{/message}}{{#message}}{{{message}}}{{/message}}{{^message}}It appears your submission was successful. Even though the server responded OK, it is possible the submission was not processed. Please contact the developer of this form processor to improve this message. Learn More{{/message}}Submitting… Share this: Related posts: 5 wound questions that could save your horse T/F Horses can eat pumpkin? How long is the horse’s small intestine? How much water does a horse drink daily?