My little Whistler is currently sick, sounds exactly like what was being described here - legs stretched out, twitching, lethargy & falling over when he tried to jump. I am intrigued about the calcium powder mentioned though, please tell me more!. I have found that whistlers are very hard to keep alive, I raised these from tadpoles myself & they've been with me a few years but I'd had many failures before that. I would love if someone in New Zealand who is a breeder could put me onto where I can get some more, I've just bought a bigger terrarium & now I just have the one lonesome little guy living in it. After I'd finally managed to source some new natural mosses too (and no, he was sick before they moved terrariums). Look forward to some feedback.