We had our red-eyed tree frog, George for over 4 years and he was probably about 6 year's old. A pretty good age for a RETF in captivity. He was a great model and a beautiful pet (although not the kind you could hold in your lap and pet often).
George had been suffering from a skin condition for a few months and it wasn't getting better, no matter what Jerry did for him. In the last few days, he stopped eating and seemed very swollen.
We found him on his cage floor yesterday evening.