I wonder if it's really neccessary to feed hens layer mash for them to lay eggs. I know hens will lay without it, just not as much. I'm thinking about making my own broad spectrum feed blend that can be used for all of my geese and chickens, I don't want to bother with special foods for special purposes. My chickens are Wyandottes and Rocks, good layers to begin with.Between 8-10 hens I'll be happy with around a dozen eggs a week anyway. How about a good scratch with oyster shells and black oil sunflower seeds added? My birds will also mostly be free range. Any advise on this idea?