Poorly grey tree frog

[Rom]

So i noticed one of my grey tree frogs has been sitting oddly lately. Usually, he sits with all his limbs tucked beneath him when he's sleeping. But now he sits with his leg just hanging limp. I looks like he's broken his toe. I gently poked him to get him to move and his toe seemed to bend backwards. I don't know how this might have happened, his been doing so well for ages. I don't handle him. He's in the tank with one other male. Might it be his fault? All the conditions in the tank have been fine, maybe the temperature has risen recently due to hot weather. Is there anything I can do?? The rest of his leg seems fine, it's just his toe.