Hi Thanks for the reply.
His naps do tend to be quite short - usually one sleep cycle (40-45min). So if he is associating sleep with feeding, then I obviously must work on keeping him awake after a feed. The only thing I'm worried about is because he has been in this cycle of Feed, Sleep, Activity, by switching it around to Feed, Activity, Sleep and keeping him up for 1 hr after a feed, he'll get overtired and then I won't be able to settle him for sleep at all.
He already has trouble napping during the day and sometimes it's an effort just to get this short nap out of him.
But I will try