Thanks Debinoz and Tylersmommy,
Basically our life is like what Debinoz describes: no two days are alike apart from wake up and bedtimes. We do try to follow the 4 hr feeding schedule - 6:30am, 10:30am, 2:30pm. The only one that's early is dinner, which is around 5:45pm. I think because she's so beat due to short naps she's ready to be asleep no later than 6:15pm so dinner has to be early, and interestingly will take her largest feed at this time of day! Of course, this means she's usually up b/w 6-6:30am. She can usually stay up 2 hrs easily after her wake up for the day. But the rest of the awake durations depend on how good that first nap is. If it's a short one, I will leave her in the crib for as long as I can so at least she understands that it's "quiet time", but if she starts to fuss I'll get her up (sometimes she does fall back asleep for a little while longer). After that we just go by her cues, and that's how we sometimes end up with 3-4 naps. Some days I'll even put her down for a 45 min late afternoon nap from which she'll wake up around 4:15 and still be ready for bed at 6pm! She's a pretty easygoing baby, and the only times she's grumpy are if she's tired or sick, so it's easy for us to tell when she needs a nap.
Sorry for the longwinded background, but based on all of this how do I determine if she's ready for just two naps? Is it just a waiting game at this point for the naps to sort themselves out, or is there anything else we could be working on?
Thanks so much for all your input - it's so great to have the support of other BW moms!