Heat a medium skillet over medium heat for 2-3 minutes, add duck breasts. The duck should not sizzle when placed in the pan, cook for 15-20 minutes or until the skin is nicely browned and the skin looks crispy,
Turn the duck, skin side up, and cook for 2-3 minutes, then remove to a plate and allow to rest while making the sauce.
Drain all but 1-2 tablespoons of dripping from the pan, increase heat to medium high and add the chopped shallots.
Sauté shallots until they start to color, then add the bourbon or cognac, and cook until evaporated, 2-3 minutes.
Add chicken stock, and cook until reduced by half, then add the vinegar and cherry juice and stir to combine, cook until reduced to a sauce consistency, about 3-4 minutes.
Add cherries and capers and stir to combine and heat through, 1-2 minutes