Aside from about 100 other arguments. What is a close eye? Does one spend 12 hours watching. I really don't think so. It can be quite amazing how fast a frog can go downhill. Also quite common for them to just disappear. That is ok you can just get a new one.Space with lots of foliage, ample food, and a close eye is key.
Keep pushing that envelope for the most wow factor. Go boys go.