I would start to worry after a week. How is Dorito doing? It's summer here and you guys are in winter so it could be the temp. Im not familar with your species of frog so i dont know what the temp or humidity it should be at. I would double check but most Tree frogs temp should be during the Day: 29 °C (85 °F) and Night: 20 - 24 °C (68 - 75 °F). I hope this helps.