Calories for breastfeeding?

Some of us who have had recently had babies and are breastfeeding should have the option in the app to indicate we're breast feeding. Most nursing moms burn an additional 500 calories a day breast feeding. That's a lot of calories and add up fast. For any given day I should be able to choose "breast feeding" somewhere and have it deduct those 500 calories. At least it would be nice. :-)