I just looked into my red eye tree frog's cage. he's all brown now sitting the diftwood. i've only had him for 2 dyas now and he's still young. when i got him he was green and now he's brown. is that a bad sign? the temp right now is around 70 and the humidty is around 70(trying to get it up) please let me know asap if it's anything to worry about