HCA: Hermit Crab Association

my crab Dark had been under the food dish for 1 week. but then he resurfaced and moved into another shell. at the same time Chipped is under the dish at that time. my first thought is a fight because i saw limbs lying around but thats only exo. now Dark is in iso and he won't eat her exo. she is already very active just like when i first got her. but how do i make her want to eat the exo? the exo she left is 3 legs and the big claw.
and i just noticed she doesn't have a left back leg even though it was there before the molt and i can't seem to find it anywhere.

I've noticed that sometimes the crabs will leave pieces uneaten. I wouldn't worry about it if the crab ate most of it and is now up and about acting normal. Just continue to offer her good, fresh foods. With her missing a leg she might immediately prepare for another molt to regrow it. You can't find it because chances are it was eaten.

can i offer the exo to other crabs? if yes how?

Yesterday I cleaned the tank and found tons of leftover exo pieces. Last night I put them in the food dish. This morning most of the pieces are gone! I think it is a good idea to give it to your other crabs.

Yep, just throw it in the food dish. You might want to offer Dark some cuttlefish bone and egg shell, perhaps laced with some honey or peanut butter, just to make sure he gets enough calcium, as he may molt again soon to regrow that leg.

thanks! i picked out the not-so-tough bits and put them in the food dish. let's hope some of them are hungry..