For Glenn Rankin, eating dog food is just part of a day’s work.

As managing director of British startup Yora Pet Foods, Rankin’s job is figuring out how to lure dogs — or at least, their grocery-shopping owners — away from traditional pet fare that contains animal meat. His company’s kibble, made from black soldier fly larvae, “tastes a bit like Stilton [cheese] on biscuits.” (Gizmo, Rankin’s five-year-old labrador, who switched from chicken-based pet food to an insect-based diet in 2020, was unable to comment.)

Livestock is responsible for roughly 14.5% of global greenhouse gas emissions, according to the United Nations. A lot of that is for human food, and some of that is for pet food. How much? Looking at just the US (the wo…