Cow and chicken feed are fastest to make, so always keep 6 in their mills. Sheep feed isn't needed as often so you can make it in either mills if you won't need cow/chicken feed for a while. Pig and bee feed are kept together because they take the longest to make and aren't needed as often. You can make extra cow/chicken feed and leave it in the factory boxes, so it's quickly restocked on shelves for whenever you use some. * Feed Mill 1: 6 Cow, 2 Sheep | Feed Mill 2: 6 Chicken, 2 Sheep | Feed Mill 3: 4 Pig, 4 BeeGoods made in the Feed Mill Explanation to the table can be found here.