If we see an animal in a state of fright or pain, it is natural to assume that they have the same feelings as we might. But is this well-grounded? ‘What animals are like’ using empirical evidence, considers which animals appear to have feelings — sensations such as pain, and emotional states such as fear. What does it mean to have a mental life? To have a mental state, a being must have awareness or consciousness. It is a step beyond the concept of sentience, the capacity to have feelings. It is possible that a wide range of animals possess a rich variety of feelings, including emotions such as anxiety and suffering.