It's true that some babies only need a short A time in the morning. But then those babies often only take a short nap - again, which is fine for the first nap at her age. If she'll sleep after only say 3 hours A time in the morning, that's fine - even if only 40 minutes. Then aim for a long second nap maybe 3.5 hours after end of first nap... Also, the walking can DEFINITELY interfere with things - it did big time here...