Is it okay to eat one hamburger per year? Is it acceptable to eat a hamburger made from a ‘happy cow’? The production of crops may result in more animals killed than the production of meat from grass-fed cattle and sheep – does this mean we should eat more meat and less crops? Should we eat insects? Should we try to reduce the suffering of wild animals? In this interview with Katrien Devolder, Professor Peter Singer (Princeton, Melbourne) provides an answer to these, and other questions related to vegetarianism and animal welfare, and offers some practical advice for those who care about animal suffering but can’t resist eating meat…