That's very interesting.They don't always eat a lot of the oyster shells, but they will consume it as necessary. I'm sure they get cravings similar to our own. My roosters used to die by 4 years when I fed a layer. Now some make it to 8-10 years old.
My previous cockerels also have only lived about 4-5 years. And I wondered if it was the calcium.
I can only get layers pellets and chick feed where I am. I haven't been able to find all-flock raiser. Actually, I have a hen who isn't laying that I was worried about too. She stopped laying at a year old, and I had nothing to feed her but layers.
I asked my dad to try and find some all-flock in England, but he didn't manage to find any. I don't think he knew what he was looking for.
However he did get me some growers for my younglings. I was wondering if it would be better to feed my cockerels & hen that isn't laying that. I know it has higher protein, but surely that would be better than the calcium?
I do get very attached to my boys.