I give my hens organic layer feed and they free range sporadically in winter (in the summer when they're out everyday) and they're eggs are pretty unremarkable. I like that I know they are treated well and what they're eating but the yolks are ho-hum. My mom says when she grew up, their eggs were deep yellow or orange and tastes delicious. Can I get mine to be that way, too? I have BOs, an EE, BR, and some mixed breeds. Help!