Do the feeding method described throughout the night and put the froglet back into it's home habitat to sleep during the day, as they are nocturnal and keeping them on that diurnal schedule is critical to keeping them healthy.

Also, don't put anything into the feeding tank with them like sticks or places to hide as they don't need those things when hunting at night, and the fruitflies will crawl up the walls of the tank where the froglet will be climbing.

You should see the little one get itself onto the ledge, under the screen cover inside the frame of the tank where the fruitflies will cluster and this will make it very easy for it to feast with as little energy expenditure as possible. This is good for a froglet. Especially one in this condition. Eventually they become very active, aggressive, acrobatic hunters but when new the less physical ones can benefit from easy feeding. The ones that aren't explosive jumpers, acrobatic climbers and aggressive eaters would not survive in the wild beyond the first week at the longest.

All of my Gray Tree Frogs are ones that would not have survived.