Ok that makes sense. I am noticing he likes a top up before the am nap but usually not for the rest of the day. It's hard to tell because he is definitely teething; looks like two front teeth are coming in already!

Which leads me to my next question: I have read that A times shorten around teething but is that when the teeth are cutting through?
He's not there yet just chewing and drooling a lot. I can see white bumps where the two front teeth are. He's definitely moody but at 20 weeks that can be due to a lot.
I was going to start extending A to 2.5 this week since his naps have shorten and NW have increased but wanted to wait until we are back home (away with family).
He seems to be irritable and tired before his usual 2.25 A but then short naps 37-40 minutes which is usually UT. Long NW have come back too. Maybe that's UT as well. So just wondering if there's any tips around this.