My cuttlefish are now taking small frozen shrimp and small frozen lancefish (I think this is what it's called). I've also had one eat a single frozen Mysis shrimp, but it was a pretty large shrimp. They seem to ignore anything very small. I need to pick up some frozen krill and try that soon.
My cuttlefish have also grown to some extent. There is also a bit of 'posturing' between the two which make me nervous, but I assume they are a pair as they've not killed each other over the 4 weeks or so we've had them. Surprisingly it's still fairly easy to spook them. They shoot out a bit of ink when this happens.