DS (2.10) has in the last few weeks seemed to cut down on the amount he sleeps. If he naps for an hour then he will only sleep for 10 - 10.5hrs at night. If he misses a nap then he will do 11hrs, sometimes slightly longer. Is this enough for his age? Just a few weeks ago he was having a nap and sleeping for at least 11hrs at night, 12+ if he hadn't napped.