Hello Rose, welcome to the forum! Congrats on your first Dragon, they can worry us to death, lol.
Can you please post some photos of both her and then of her entire set-up and her lighting? That can help us advise you any husbandry changes you may need to make. Her temperature zones look like they are all within the correct ranges, so that's excellent.
I can ease your mind of a few things you mentioned: First of all, the markings on their bellies that are commonly referred to as "stress lines" are not anything of the sort. I don't know how that ever got started, but they have nothing to do with stress or anything else, other than they are just markings on their bellies, just like they have markings all over the rest of their bodies. And the reason that they darken and then lighten or go completely away, just like the rest of their body colors are constantly darkening and lightening, is because they do this purposely to attract more light and heat. So when they are in their tanks and under their lights, they will darken themselves to absorb as much of the light and heat as they can, but when they are taken outside of their tanks where there are not lights, they will lighten back up to their normal colors, because there isn't any light or heat to absorb. You'll notice that if you put him in a sunny window, outside of his tank, he'll darken there also. That's because he sees the light and feels the heat, so he wants to absorb more of it...and the markings on their bellies just darken and lighten right along with the rest of their bodies. Perfectly normal and not stress-related at all!
Also, Bearded Dragons never ever brumate as babies or juveniles. Usually they have to be well over a year old to go into even a partial brumation. Although there are some dragons that will go into brumation as young as 9-10 months old, that's extremely rare and they are usually well over a year old when they do this. Some never ever go into brumation, as it's not necessary in captivity, as the reason they do it in the wild, or at least the "accepted" reason why they do it in the wild, is to deal with harsh winter conditions and as a way to get through that time period. But a young baby or juvenile will never go into brumation, that's certain. Usually when a young baby or juvenile dragon becomes extremely lethargic or stops having any appetite, 99% of the time it's due to inadequate type of
UVB light or too short a daily photoperiod under both their bright white Basking Bulb and their UVB tube (should both be on for at least 13-14 hours every day). Usually though, it's due to an inadequate type/brand/strength of
UVB light, or having the
UVB light mounted too far away from the basking spot or obstructed by something, usually a mesh lid to their tank.
If you can let us know what type of
UVB light you're using (brand, model, wattage, and "type", meaning long tube, compact (regular lightbulb shape), or coil/spiral), we can ensure that you have both an adequate
UVB light for a bearded dragon, and that it's mounted appropriately.
