Black belly?

[9west2124]

my new bearded dragon she get dark on her belly and her beard when she is in the cage but goes back to normal white when she is out what could it be? Is she stressed out in her tank then fells fine outside of it or is she just getting darker so she can get all the light she can get?

[9west2124]

ok i think i figured it out i added a piece of wood i got from petco yesterday. i took it and everything else out of the cage to feed her and put stuff slowly back in. i left out the wood piece just because it is the only thing i added to the cage recently besides a cactus. I know she lovesssssssssssssssssssssssss s the cactus cuz she sleeps all night long on/in it its so cute. so i didnt put the piece of wood back in and she is back to normal color on her belly and beard.