Rose, As long as he is making plenty of poops and pees (especially pees since babies can go fairly long between poos) I wouldn't worry about it. Emily, she's quite a bit older but not by her adjusted age, is going for about 15 minutes at night, give or take, actual time nursing. The amount she gets up at night still really varies. I am sure Alfie will let you know if he needs more. It's so hard not knowing how much they are taking, isn't it? I go back and forth between wondering if she is getting too much or too little!