I have 6 hens and a rooster, all going on 5-1/2 years old, the production is down to about 4 eggs a week total. I am not going to butcher them but would like to economize on feed. Scratch is about half the cost of layer feed. I think they would eat it up. But would they be OK on this and whatever bugs they can find (they are free ranging)? Are there any other options?