This richly drawn ethnography of Samburu cattle herders in northern Kenya examines the effects of an epochal shift in their basic diet-from a regimen of milk, meat, and blood to one of purchased agricultural products. In his innovative analysis, Jon Holtzman uses food as a way to contextualize and measure the profound changes occurring in Samburu social and material life. He shows that if Samburu reaction to the new foods is primarily negative—they are referred to disparagingly as «gray food»...