They will eventually eat the pellets, they just prefer the crumbles, but they waste too much. I used to feed a layer and all my roosters that ate it were dead by age 4, those that don't eat layer will live longer, so far my oldest are 7, so I assume they will live a more normal lifespan. I also found that my birds become protein deficit on a layer, so an All Flock is a good all around ration, with a protein content of 18-20%. When I'm adding new chicks to the group I put out a dish of non medicated grower that everyone can eat until the young ones can eat pellets.