I have a batch of 2nd instar emperors that are a little less than an inch. I feed them live adult crickets already. They clamp on and start stinging until the cricket is mostly dead. Sometimes multiple scorpions will attack the same cricket. About 25% of the scorpions are too timid to attack the crickets so I have to pre-kill a few for them. So if you feed yours young crickets then they should be fine.