The 500 Holstein cows at Shatto Milk Co. may outnumber the human residents in their hometown of Osborn, MO (pop. 423). But they still get an awful lot of love here. They have a herdsman dedicated to their care, along with a team that includes agriscientists and a nutritionist working to keep them happy and cool in the summer heat. They have farmers growing some of cows’ favorite foods just…