Sorry if this has been covered before but can't find the topic at the moment. Today we butchered some elderly roosters and hens and younger hens too. Half the livers were yellow tinged, the rest were normal liver color. I separated these two colors as I'm not sure the yellow ones are healthy. I wasn't present and dh (who was helping) believes that not all the odd colored ones were from the older chickens. What would cause the yellow tinge and would these be safe for pet food?