i have 2 chinese fire belly newts... i looked into the cage today and noticed something weird on one of their legs...i looked closer at him and relized that it was swollen, miss-shapen and weirdly colored... as i've watched him today i've noticed that he's really lathargic. i found him just a minute ago just stuck to the water intake on the filter cuz he was just too lathargic to swim away. i though he was dead for a second, till i tried to grab him yo look at his leg. i'm really worried. i have a few pictures of the leg...anyone know what it is or what i shoud do?