Okay, I have two hermit crabs, Blue (blue legged) and Grenade (red legged). Grenade has been always at the mercy of Blue. Tonight, I found that Blue has once again pulled Grenade out of his shell, for the second time today. I separated them and Grenade got back in to his shell. Blue is bigger than Grenade and has a bigger shell, so I don't think they're fighting over shell space. I also have some empty shells available to them to mix things up. I'd like to keep Grenade around, what can I do to help keep him safe? Thanks!

