Bella you are doing a marvelous job hun, just go with the flow. If Jack is taking more than what the tin says, it's because he is a hungry baby. The tin is just a rough guide, if he wants it then give it, would be my advice. If he's had too much than his tummy can handle he will bring it back up, if he's not doing that then he's fine with it. The little one will drink when he's hungry enough, I think my two drank around 80-100mls at that age too and I found sometimes they wouldn't go a full 4 hours. As they get older you will find things just fall into place and they will be able to go the full 4 hours. It's only a phase at this stage and soon gets easier.

Just click on my facebook link and send me a friend request Bella, let me know who you are, can't wait to see pics