Recently I have been getting a few eggs that don't taste "right". They don't smell rotten. Usually the yolk breaks when cracked and the albumin isn't thick like usual. I have a flock of mixed ages. I am wondering if it could be eggs from my older (2 1/2 yrs) hens. My flock is free range. Is it time to cull? The older hens are like pets and I will hate to cull them. The feed is the same, always gather eggs daily and hens always have fresh water. ?????? Any ideas appreciated.