I would certainly quarantine them for a while. I don't know how toxic they are, but we have quite a few of these in our basement, and there is a remote possibility they walked through something I don't want my cham to eat, like a cleaning agent. And I agree about removing the back legs. It's quite unnerving to have a camel cricket the size of the palm of my hand jump at me not away. I know their eyesight is poor at best, and they are pretty much harmless to humans, but it's still creepy.