My son has been a great napper since we started sleep training around 2 months. Usually 2, 2 hour naps and 1, 30-40 min nap. Since last week, he will only nap for 30 min at a time. His first nap is usually around an hour, if we are lucky and then the rest are just terrible. By mid-late day he is just a bear because hes so tired, but he just. wont. nap. His awake time is usually no more than 2 hours. We have always watched for sleep cues, and still do. We havent changed anything to his routine other than adding baby food (along with an oz or 2 of formula) to his afternoon feeding. What the heck is going on!? Its driving my husband and I crazy.