For the last week, I have put in different foods every couple days, they didn't seem to be interested in any of the new foods. So, after a couple of days without them touching any food, last night I put in their favorite carrots! Something they ALWAYS eat. They didn't touch it. I don't know what else to do. I've had these crabs for 4 years and NEVER had this issue and I haven't done anything new (except the food which I do all the time). Nothing in the tank is new. I am at a loss and a little worried.