It seems that pet dogs consume one fifth of the generated meat and fish generated on the planet (although one has to admit that pet foods generally contain the products that are not favoured by humans). so, if one wanted to reduce one's impact on global warming by consuming more plant-based food, one has a problem if you maintain a carnivorous pet. One semi-solution seems to be to use a recently marketed (in the UK) pet food that uses insect larvae as the source of much of the protein (https://www.theguardian.com/environment/2019/jan/10/dog-food-made-from-insects-on-sale). Insects can be quickly grown and are associated with much less carbon dioxide and methane generation than are cattle. They can also be homogenised into the food items. This might give pet-owning 'greenies' the best of both worlds but it will only be of benefit if it doesn't reduce meat production by cattle (otherwise, the offal might simply be discarded).
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