Beardie not to active lately

[GP212]

Hi all. I have a 9 month old BD and the day after Christmas he started to be less active and eat less. He still seems to be very alert but stays in one spot (cool)and eats very little. I figure that it is just the winter dormant thing that I was told adults go through but I am not sure. Is he an adult? He doesn't "poop" much but when he does it looks to be normal. I hand fed him the other day(greens) and he ate some. He looks good just looking for some comments to reassure me or send up a flag.

Thanks!!