I think we are starting to transition to one nap. She's giving a lot of cues that she's ready. So today I pushed her to noon for one nap, but she only slept about 80 minutes, which is not enough if it's the only nap (for her or me!). That is how long she has been sleeping in the afternoon, in addition to 90 minutes in the morning.
Did it take a few days for them to start sleeping longer when you went to one nap (if you tried to transition cold turkey?). She did have poop in her diaper when I went in to get her, so I guess it could have been a fluke.