I'm thinking maybe 150 pounds might get you there if you harvest early. Math says 180, that's why I suggested 200... If you have trouble finding it, pm me and I can give you steps to get you some.Thanks rjohnsI will call our feed store to find out if they are able to order. When I have an idea on when we will be starting this I will PM you to find out where to buy feed if that's okay. Both our organic layer and organic starter that we buy at Costco and Tractor Supply are $20 for 40 lbs and I think that would be more like $100.