K.O.
My daughter will be 10 months old on the 5th and she wakes up between 7-8 am and goes down for a nap from 10-12noon and the again at 3-4:30 or so. by 7pm she is having a melt down..earlier if she misses that afternoon nap... but I can't get her to bed until like 8-9pm. A few months ago I couldn't get her to nap at all! All babies are different. Have you asked her doctor?