Board Thread:Questions and Answers/@comment-30138124-20170915044123/@comment-1738746-20170916042558

Regarding the eggs and hatchlings, it is possible to kill them with too many views, also known as Dragon Sickness (you can read more about how this happens by following the article).

With regards to an adult dying though, that is not meant to happen. If anyone else has your login, they may have logged on and done this (if you never gave your login to anyone, would be worth changing your password just in case). You can also access your Actions Log to see when you may have killed your adult- if your adult is not listed there has having been killed, I would contact TJ09 on the forums as it may have been a glitch.