Ive had my hermit crabs for almost 3 weeks. First we got 2 from a boardwalk and the following day were so excited we bought 1 more from a pet store. We immediately set up what seem to be optimal living conditions according to information i found online. Unfortunately 4 days ago the biggest and most lively crab started to act different. I saw him digging at first, never under the sand even though it is plenty deep. I didn't know at the time that it could be a sign of distress or molting and later that day took him out to play, he loves coming out...but he did nothing, he came out and just just sat there doing nothing. After searching the internet and reading about molting i isolated him in a separate tank. i woke up to find him missing a leg and acting rather lifeless. he was still moving about slightly, but just in a circle. That afternoon he came completely out of his shell, i happened to be watching as he did this and pushed the shell to the side a bit because he seemed so weak as he tried (later reading it is not good to help them in any way). That night (3 nights ago) was the last time I saw him move. He is now laying there on his side with no changes, his body color got darker and seemed to deflate a bit. I am afraid he is dead but there is only the faintest smell which has been there since the first day and not worsened at all. What should i do? What does the exoskeleton look like? Do they leave behind their eyes, cause they are still there? Today the crab i bought along with the lifeless one began digging. I found another suitable isolation tank and isolated him. He began doing the same things, turning in circles, digging down just a bit, and not coiling up back into his shell. Finally he moved but just into the corner...im afraid he is following in the others steps. Could they be sick, or molting? There is nothing more i can add to their habitat. What now??? PLEASE, help...these little guys won my heart already!!!