I have a very, very ill newt that I decided I would anesthetize and then euthanize as he could not even regulate the air he was "eating" and was floating with use only of three legs... (He obtained a fungal infection some time ago but fell into a remission now 5 months later when he got a minor cut, which worked its way up to a large lesion in addition to other fungal sites which did not respond to other treatments). I tried the ventral application of a 20% benzocaine product which would allegedly put the animal down in under a minute. I was very upset as this was my "baby" if you will, and I returned from a bout of crying to find he was in a different position. This was even more disturbing. I tried additional applications fo the benzocaine and even fifteen minutes later he was still moving! This was extremely traumatic, and he is still yawning and stuff right now. I placed him back in the quarantine tank, as it seems it has only anesthetized him. He is there as we speak. I am VERY upset! The information listed on Caudate Central noted that this was a quick and effective method of euthanization and my poor little guy still has not passed! If you have a terminally ill newt, do NOT use this method! (My newt is a 6 inch Cynops pyrroghaster).