New Mountain Dragon parent looking for tips

[Japho]

I recently became the proud parent of a couple of Mountain Dragons. Someone moving on their reptile enclosure and setup, with 2 inhabitants. These are my first dragons, though I’ve kept skinks for a while. I’m wondering about brumation and heat lights and feeding and things.

One of the dragons is near adult size and the other is quite small. Both barely move at all, particularly the adult.

I’m wondering how I tell whether they’re just in brumation or if they need to eat regularly. I don’t know the person who has them previously, so no clue how they were treated previously.

Also, should I be putting a heat light on them during this brumation period?

Thanks for reading a noobie’s post. Any advice welcome!