Hi bro, you need to get them live shrimps asap. Its either they have been shocked into not eating by the shift or they werent eating frozen in the first place. I would believe the latter is true in most cases. Anyway, try to get juvenile shrimp somehoe and feed them. If not, you got to give them up. I also bought 3. But i only managed to train 1 so far to eat frozen mysis. So im feeding live shrimp until they recognise frozen mysis as food. Pm me if you need more help