Clean the chicken breasts, the cut them lengthwise into same size pieces and wrap each with a slice of prosciutto, they are easier to cut if allowed to freeze slightly.
Preheat oven to 180 degrees fahrenheit.
Place on a foil lined baking sheet 1/2 inches apart, brush sprinkle with sage.
Dry in an oven, with the door slightly open to let out moisture, for about 3 to 4 hours, until meat is dry appearance and texture.
Cool and store in an air tight container.
Notes
If you have a food dehydrator it can be used to dry the treats as well, just follow the manufacture instructions.