I am the mom of 2 female beardie that are about 1 1/2 years old. One of them lately has been acting " stressed" .She walks up and down the cage. Also, the underside of her throat takes on a black color. Ill get her out and let her burn off energy the black seems to get better. I have them in a 40 breeder glass terrarium habitat with lots of things to climb on and under. Any ideas I can Get to help her would be great.