My 8 month old daughter is a very busy girl. She is so busy that she doesn't really slow down to nurse or have a bottle during the day. When I am with her, she doesn't really ask to nurse, I just make sure and do it every few hours to keep up my supply. My parents (who take care of her while I work during the day) say she doesn't ask for a bottle either. They give her one because I tell them to.
I don't think we are missing her cues. She does nurse pretty much all night. Neither I nor my dh has an issue with her night nursing as she is also co-sleeping for much of the night (pretty much midnight to morning) and we like it that way.
She is gaining weight, but she is small (approx 16 lbs). She has at least 5 wet and 1 poopy diaper during the day. She is eating solids (and loves it). She does burn a lot of calories by crawling around all day.
I really don't think I need to worry, just wanted to check. My only other child (now 10) was a constant nurser and I never seemed to be able to pump enough for her so I'm not used to this.