I have...well had, a 6 month old trio of Golden Tree Snakes. There had been no problems with them before and one day I awoke to find one of them had died. The remaining two were as lively as ever. The next day as I prepared a feed, one seemed very limp, a big change from the previous day. He refused to eat and died within the hour. The largest of the three is all who remains and it has been a couple of weeks and he is thriving. These snakes, fed regulary with no hassle, never showed any signs of distress or health issues and temperatures were kept up to requirements in the enclosure, which was clean and in good condition. It's a real mystery but whats done is done. Just wondering if anyone on here has some ideas. I spoke to my old co-workers at the aquarium and they didnt have any idea just like I did. Last one standing is doing great though which is a highlight.