Found injured Grey tree frog, need help with nursing him back to health

[fspike]

He seems to be almost completely better at this point, but I havent been able to get him to eat at all as far as I can tell. I let him go just now since I believe he will be able to survive just fine as he is and he will be able to find his own food in a less stressful environment. Im gonna keep checking on him for the rest of the day and if he doesnt seem to be doing well ill take him back in, but I believe this is for the best. He has been losing weight for the past week and has been increasingly lethargic. I hope he does well in the wilds of my backyard. Godspeed little buddy.