It's spot prawn season here in BC. I've been bbq-ing them with the shell on and just eating them plain like that. No salt or seasoning. I was wondering how / if I can compost these shell? It seem such a waste to throw the shell in the garbage. Could I maybe put the shells in a blender, blend them and use the liquid like I would fish emulsion? Does it work this way? Or is there no nutrients left after the shells have been cooked? DH thinks it would attract rats and racoons. What do you think?