I think I could. The hardest part would be planning meals that don't feature meat, fish, dairy, or eggs but there are plenty of other options available. Truth be told I've always felt conflicted about eating certain animals such as pigs who are really very smart. Also the conditions some animals are kept in, for example chickens, are really pretty terrible. I've mostly just kept these facts out of my mind when eating but the day may come when I can't ignore it anymore.