Are you giving him enough bone? Raw egg is okay once in a while. I personally don't feed it as even my feral cat does not like them. I probably would not give egg shells if you are giving enough bone. If you do decide to give egg shells, dry them out and grind them up. It's usually a pinch per meal to replace bone. It's just calcium and minerals.My one year old is clawing at the garbage for the eggs shells Is it safe to give him raw eggs and also the shells?
Here's the website it came from:I see no problems with feeding your cat raw egg yolks from time to time. But try to avoid raw egg whites, as these contain a protein called avidin that can bind to certain B vitamins and prevent their absorption.³