I haven't tried that yet, Aishi. Maybe I will do that every couple of days for a catch up nap. We did a NND today because he woke at 7:30. Usually he is up by 7:15/7:30. I don't know why he was up at 6 yesterday. Just an odd EWU. So maybe if he wakes at 7:15, then a short nap at 1:30-2:00 and usually put down at 8:00 to get an earlier bedtime. Earlier as in the 8's, not 9's or 10's as he has been doing. My guy doesn't need any more than 11-11.25 TS with a nap or without.
I'm thinking that the nap is just more of a hassle these days and causing him to sleep so little at night. That short night sleep really affects his mood. He seems much better with a longer consolidated 11-11.5 hours than a nap and short night sleep. He seems to have a little sniffle too so he might not be himself right now. I'm aiming for an 8:15 bedtime tonight.