I was just informed by the feed store that layer feed encourages chickens to lay. That they will not lay if they are not fed it, and that they should only be fed it if you want them to lay.
Anyone agree with that? I don't. Layer feed has lower protein, and adds calcium. That has been my understanding.

layer feed is formulated to help hens and pullets form and lay eggs. They will lay eggs without it and since you will have a rooster in with the hens, you should not use it.
A good grower feed with free choice calcium is what you want to use. There is too much calcium in the layer feed so it will slowly over time kill him. It may take a couple of years but he will also not be as healthy.
We are going through something similar with my Wife. She has had too much calcium in her blood since at least 2007. The Dr.s are letting it happen but we are now going to work with another group to get it fixed. The most common cause, and the others have already been ruled out, is a benign tumor on one of the four glands that regulate calcium in the blood.
Anyway, too much calcium is a bad thing regardless of species.