Hi there
i do think its very little sleep for such a LO, but every baby is different, my DS really needed 2 2hr naps at that age, and in comparison my niece only took one 1hr nap and then a 30min catnap at that age, and she was happy as ever, so you see, every baby is different, i think if her nigth time sleep is fine, and she is a happy chippunck, you should leave it like that, but do try to get her to take a catnap, so that she isn't grumpy by bedtime. Why are days when she doesn't take a catnap?