Off topic lih (sorry) but I follow the adventures of the various eggs/dragons in people’s signatures even if I don’t collect them myself. At the moment three of your eggs are “fuzzy” [you can’t seem to find the dragon you are looking for] blobs. What does this signify? I have been wondering for a while.
As far as I understand it, it hides the egg so that it cannot collect views. I’m not sure why one would hide their eggs, though I do remember reading about a illness your eggs and hatchlings can get if they are viewed too much too fast, so maybe that’s it?
No problem etruscan 
Sirithiliel got it right on the first try. When that happens, you get a message at the top of your scroll showing which eggs are sick, so you just hide them for a little while, and when the fogged eggs disappear from the top of the scroll, the’re ready to be viewed again!