My daughter is almost 9 months. She's EBF, never ever took a bottle. (She refused any and all bottles regardless if it was formula or breastmilk) also refused any sippy cup except the munchkin 360. well now she's just so rough at the breast. She digs her nails into me and pinches. She's bit me only twice. And her latch is just so strong leaving my nipples extremely sore.