A couple more thoughts for you: 1) Maybe there is something else going on with her that makes her less interested in nursing as often. Could she have a little bug? An ear infection? I didn't see if you said how long this has been going on, but it's possible it is just a passing phase and will resolve itself soon. 2) Part of the equation for how often baby goes without eating (which I don't think has been mentioned yet) is your own breast storage capacity. If you have great capacity and your LO can go 5 hours between feeds without it affecting your supply, that might be okay. Moms with less storage capacity (which has nothing to do with breast size, BTW) would probably find that their milk supply would start to be reduced if they regularly went that long with emptying their breasts. If you feel you have a generous supply and your LO is getting what she needs, maybe it's okay. :shrug
I wonder, too, if your baby has reached the point where she's starting to notice the world more. My DD has definitely gone through phases where she is more or less interested in nursing based on what is going on developmentally. And she definitely nursed a lot less after those first few grueling months where I was glued to the couch.
Wet diapers should really be WET in my understanding. Be sure that you're considering an entire 24-hour period, though. Of course, some will be drier than others.
The previous poster who mentioned storage capacity of breasts was on to something. My capacity (I know from my many months as an EPer) is large, and that was a huge benefit to my LO because he only nursed on one side for a couple months.
I picked a day when he was around 11 weeks old, and I'm going to tell you what he did eating-wise that day. Maybe it will help you. (It wasn't totally typical because he slept till 4:30 that morning, but it's pretty reasonable.) We had a rented scale which is how I know the amounts he ate.
4:30 a.m Nursed R - 5.2 oz
6:00 a.m Nursed R - 2.8 oz
7:30 a.m Nursed R - 3.0 oz (no success on L)
slept in sling
10:30 a.m. Nursed L (I'm wondering if my notes are right because I don't think he really was on that side, especially as I had pumped the left, but it's what the notes say) - 6.2 oz
slept some time in swing (turned off once he was asleep)
3:30 p.m. Nursed R - 5.5 oz
6:30 p.m. Nursed R - 3.4 oz
10:15 p.m (I woke him up) - Nursed R - 2.4 oz
Then he slept till 6:20 (which was not normal, and we didn't encourage. The next morning, though, he tanked up with a total of 8.9 oz at one feeding. The next night he was back to being up at 1 and 2 and 4 and 6, which is more of what we did till he started sleeping longer stretches around 6 months. We never scheduled him and always fed on demand (or offered when he wasn't demanding because we wanted to make sure.)
I'm giving you this detail because I'm hoping it will help you to consider if your LO is tanking up after she goes a long period without eating. Is that when she has a soaking wet diaper.
I would continue to offer the breast whenever you think she might be hungry (and take hands at the mouth as a cue). If she doesn't eat, she might not be hungry. Just watch the overall WET diaper count, and if you then have a concern, take another step to see what's going on.
Hope this helps. My daughter's now sitting on my lap, so I'm sorry I can't proofread or make sure this is as sensible as I want it.