Hello. My chin Pufy also does the same. usually when i get him out of the cage he plays a little, then hides and sleeps then when he wants to he comes out. Always does that and he is always playing when he wants to. I know, he trained me well.
He has his favorite place under apiece of furniture in the room and some of the days he just likes to sit there. I did not see any change in his poop or did not change his diet.
He is a spoiled chin and yes, he has his moods
Dan