is this normal behavior?

[NewKingJoe]

alright so her lower area is turning black and so is her tail why is this?!

 

[JGuinan007]

did she eat any substrate along wit hthose 15 crickets she ate?

 

[NewKingJoe]

well, I took her back to pet smart tonight around 8pm and they came to the conclusion she was eggbound and I bought her at the perfectly wrong time. they said she was probably ready right when I got her and the sales member who sold her should not have sold her. I have returned everything at full price and will no longer be caring for a chameleon at the moment..
R.I.P Leala ♥