HCA: Hermit Crab Association

Thanks. Would any dead crickets do or do they need to be fairly fresh.
Trying to give them a more simulated diet since they are scavengers.

Will crabs eat crickets?
Are crickets able to live with crabs?
Will they hurt the crabs?

All 3 crabs I’ve bought from petsmart have passed away. But my crab I got from a shop at gulf shores is still perfectly healthy. I’m sad and tired of my crabs dying and want my original crab to have a friend. The 3 I’ve got from petsmart died within months. Am I doing anything wrong but my crab for ...