Subjects enrolled in this study will either use Santyl daily or follow standard care procedures for up to 6 weeks for their diabetic foot wound. After 6 weeks of treatment, the subjects will continue into the follow-up phase for an additional 6 weeks. Study doctors will look at the wound in the office each week (up to 12 weeks) to see if the wound is healing. Depending on a number of factors at each office visit, the study doctors may also use a procedure called sharp debridement to remove dead skin from the wound.