I was worried one day last week when I saw one of my orange dwarf crayfish hadn't moved after several hours. (It wasn't clearly visible, the tank is heavily planted.) I moved some plants out of the way, and found it was only a freshly shed exoskeleton. The crayfish was/is fine, but the molt still isn't very active... ;D
Mine molted again last week, and watching it clean up the mess was amusing. Of course, the fish got in on the fun to, which I thought strange. A couple of days ago, I dropped a piece of chicken in, and watched my cray go to town. Last night, I did it again...I kept leftovers. Much to my surprise, all the fish got in the act. I had 3 tiger barbs and the cray grabbing at the chicken. It was very cool to watch.