In 2009, Marc Bekoff was asked to write on animal emotions for Psychology Today. Some 500 popular, jargon-free essays later, the field of anthrozoology -- the study of human-animal relationships -- has grown exponentially, as have scientific data showing how smart and emotional nonhuman animals are. Here Bekoff offers selected essays that showcase the fascinating cognitive abilities of other animals as well as their empathy, compassion, grief, humor, joy, and love. Humpback whales protect gray whales from orca attacks, combat dogs and other animals suffer from PTSD, and chickens, rats, and mice display empathy. This collection is both an updated sequel to Bekoff 's popular book The Emotional Lives of Animals and a call to begin the important work of "rewilding" ourselves and changing the way we treat other animals.