Two of my cuttles ate frozen krill today!!! I sure it is probably a fluke and they will never do it again, but I am going to continue to offer krill before feeding them live. I defrosted the krill in salt water, took one that still had eyes and placed it about 1-2 inches in front of the cuttle. The krill swayed in the water current and in about 1 minute, the cuttle aimed and grabbed it. They didn't spit them out (yet...) so I left them alone with their dinner. I will offer live shrimp later tonight.