I am wondering how much you can tell about a tortoises health by the looks of the shell. I'm sure it's a lot, but I wouldn't know how to decypher the signs. This came up because I have noticed that Ayana's shell has become increasingly dark and the lines have become very thick.. I wonder if this is because of some sort of health issue or deficiency. Here are some before and after pics. and As you can see, at a month old, her shell used to be very pale and the lines were very thin, but now, at about, 6 months there is a drastic changem is this normal?