VERY ILL Fire Bellied Toad.I Woould Really like Expert Advice!

[GeckoToad]

He is about two years old,and the smallest of the three.He lives with two other toads(of the same species)and one Gold Dust Day Gecko.They are all very healthy.He has gotten very thin,his tail bone even juts from his back.He still swims and hops around some,but isn't aggressive wnough to fight for his food.I could really use some expert advice,I don't want him to get worse or get hurt!

[GeckoToad]

Anyone?His name is Sheldon,he's two years old.Fairly Young,so his age isn't the problem.He's being seperated from his terrarium mates...

[GeckoToad]

It basically feels like holding wet air.I mist them every day and feed them gut loaded crickets with calcium rich food(for the crickets).

[GeckoToad]

Ok,well,if you see this board and can help me,then my email address id scout3080@msn.com