My DD is almost 4 months old and has always been a fantastic sleeper, she's slept through without a feed since she was about a week old. Up until a few weeks ago she was having her last bottle at 8:30-9pm and waking up for her first the next morning at about 8:30-9am. Now she's having her last bottle at about 6-6:30pm and not having her first one the next morning until 10-11am. She's a perfectly happy& healthy baby and I'm soooo grateful for the sleep and that she's so laid back but others have questioned us. My dad is convinced this is not okay and it's not healthy to "let her" go that long without milk. I've never woken her up for a feed, I've always fed on demand (I know, shoot me). What do you think? Should I just be grateful and make the most of the quiet time or should I be concerned that she's going too long?