URL：https://www.shutterstock.com/shutterstock/photos/2165227687/display_1500/stock-photo-black-and-white-female-dog-who-has-recently-given-birth-with-visibly-enlarged-nipples-to-be-fed-2165227687.jpg
掲載元：https://animalia-life.club/qa/pictures/why-have-my-dogs-nipples-gone-black
