You might want to increase the protein of your flock. Either by adding some animal protein, some cat kibble, or switching up to a Multi-flock and offering oyster shell on the side. Often when you supply the extra protein that the flock is craving, the egg quality improves, and the egg eating...
I love breeding my own birds. My avatar EE roo throws some very nice chicks. I got a nice group of black sex linked green egg layers last year (EE x Dominique). Plan is to get some Dom chicks next spring to carry forward with the BSL chicks. My base flock is bred from Rose comb brown leg...