It's not abnormal if they do that. But what you might find is that she will go for a few days or a week without a sleep and then the next day she will sleep for 2hrs, and maybe for the next day or so as well. They can be fine without a day sleep every day, but sometimes it can catch up with them and they just need to have a sleep again kwim? Like my DS2, he is 2.5yrs and generally doesn't have a day sleep, but for the last three days he has had one - he is still asleep now. So just play it by ear, if she doesn't sleep, then she doesn't sleep, but if you think she really needs one after a few days, try to make her have one, but if she doesn't thats fine. Another thing you could do is if you do think she is getting overtired, bring her bedtime forward half hr or so and see how she goes.