Ha, I guess my ODS was doing the unrealistic - when he was on 2 naps, he napped 1.5 hra 1st nap and 1.5-2 hrs 2nd nap and then 12 hrs at night at 10 mos. I think it's possible but depends on the baby - ODS has always been a higher sleep needs baby. Could your LO be teething? I found that when DS was going through teething episodes, his naps would all of a sudden go to crap even though his day would be consistent - think "Groundhog's day" movie