Probably the more space they have the less feed you will need to buy, especially if cross fenced and managed well.How much space do Yaks need? I am really curious as to how Yak's milk tastes. If we move to Missouri or Wyoming we are looking to get a much bigger place. If we stay here it will be until the youngest turns 18 and then it will be selling this place and move to something just for DH and I.