I am going to recommend again... Respectfully and not talking down to you or your uncle... I doubt your uncle would mind if you took upon yourself to either buy, or go to the hardware store and build a proper enclosure for his cham. The fact that he took in the cham and has not taken it apon himself to do this... may mean it won't get done unless you do it. Why rescue a cham if you are not going to provide the proper cage for him? With the weak grip and other stuff... It really just sounds like there are so many issues at hand...The best way to fix this is to start from step one, being the proper enclosure, and work out from there with feeding, lighting and supplementaion, and proper monitoring of temps and humidity.
What I am saying is first he must make sure the husbandry is air tight... Then address any heath issues that still persist at that point. But to try to address any issues with the cham with holes in the husbandry would be a fultile effort until he knows that he is providing everything they should need to be healthy.
~Joe
