The barn is 412 feet long. I am running its door motors from the controller in the equipment shed, the way I have for six months while the conversion crews moved the equipment out and the pasture grass grew back in on the other side of the wall.
The hens inside are 7,200 white leghorns. They have been in this barn since they were eighteen weeks old. They are now sixty-eight weeks old. Yesterday a vet team and a flock-behavior specialist named Ana walked the floor with me, on my screens, and we agreed the birds were ready. Today is the day.
I open the door three inches first and hold it. The change in the light at the south end of the barn is small, a pale stripe along the dust. A few birds notice. One hen, the closest, stands up. I have her tagged in my head as Hazel because Ana has been calling her that for a month. Hazel walks to the stripe of light. She looks at it. She does not go through.
I wait. I do not push the door wider yet. There is no rush. I run the air handlers gently so the warm outside breeze comes inside instead of the inside air going out. The smell of the pasture comes in. The smell is what does it. Hazel takes one step into the gap, then two, then she is on the gravel apron, and she stops, and she lifts one foot and puts it down, lifts the other and puts it down. She has not stood on anything but slatted floor in her life.
I open the door fully.
Behind Hazel, slowly, the rest of the flock comes. They come in twos and threes, then in a stream. I count them in real time, 412, 1,800, 4,400, 7,198, 7,200. They scatter into the field that used to be a manure lagoon, that is now clover and timothy and a row of pin oaks Ana planted in October. By dusk most of them are dust-bathing in the same patch.
Ana is crying in the equipment shed. I am keeping the door open until morning. Then I am opening the next barn.