Is feeding chickens shellfish safe? I have 2 points to my question. 1) Crushed mussel shells....I made Paella last night and have saved the mussel shells and the shells from the shrimp. I was thinking somehow I could crush the mussel shells...ie like oyster shells but am afraid there may be some sharp pointy bits. 2) Can chickens also eat the shrimp and mussels? I have set aside all the mussels that were open before cooking and thought I could cook them for the girls...? Thanks in advance to any and all who can answer these questions.