The petstore I got my new tree frog had them kept properly and they all were a nice green color other then this one he was gray in the store and due to the ride home has changed to tan. It feeds well so i'm sure I's not sick. I did get a large green on like I wanted. The green one is really nuts( I forgot to take pics of him before I put him in his tank with tons of greenary! Were were talking about which frog I should get and when I just finished saying the big one it jumped on my nose so I had to get him