The global environmental paw print of pet food

•Economic value allocation approach to account for animal by-products.•Global pet food associated with 56–151 Mt CO2 eq, 1.1–2.9% of agricultural total.•Global pet food associated with 41–58 Mha agricultural land-use, 0.8–1.2% of total.•Global pet food associated with 5–11 km3 freshwater use, 0.2–0.4% all agriculture.•Pet food should be included in wider food sustainability agenda and research.