This condition can be detected fairly easily. Symptoms of quittor include a warm, swollen area above the coronary band. It is normally very painful to the horse when touched. If sores develop, then you will see them with pus as well. Then you will start to see the horse becoming more and more lame due to the pain from the condition. Eventually a horse may not bear any weight on the affected leg. Treatment for this condition can start with antibiotic medicine that can be applied to the wound. Sometimes however this may not work and surgery is needed. By performing surgery on a horse with quittor, you can remove all of the dead and affected material to prevent it from reoccurring. To prevent quittor in a horse, make sure he is shod properly and regularly to prevent cracks, also any puncture wounds to the foot should be cleaned thoroughly.
Here is a link to a video of a horse with quittor: http://www.youtube.com/watch?v=V265McRiyKs
Here is a link to an interesting website about quittor: https://www.drafthorsejournal.com/read/autumn2005/doc-neuman