For the longest time, I had crabs that were all very different in size and color. It was easy to tell them apart! The recent months have brought me a few similar sized crabs. Three of my crabs are the same size and have the same coloring. I was away for a few days and *all* my crabs went on a shell changing spree. Now I'm not sure who's who - mostly the "triplets." Am I a horrid mommy? And are there any hints/tips for me so I don't do this again?