Sorry, the flock is a big potluck of different ages. A couple of the bantams are several years old, a couple of the orpingtons and rhode island reds are just shy of one year. We inherited them from a friend who moved to Hawaii and couldn't take them, they were pets and pretty much still are.
The chickens we got were always fed layer feed and we've been feeding them the same thing. However I was recently told the higher mineral levels in layer feed can damage our rooster's kidneys. Should I get grower feed or something instead and give the hens oyster shells? What do you recommend...