Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Animal welfare is the physical and psychological well-being of animals. Systematic concern for animal welfare can be based on awareness that non-human animals are sentient and that consideration should be given to their well-being, especially when they are used by humans. These concerns can include how animals are killed for food, how they are used for scientific research, how they are kept as pets, and how human activities affect the survival of endangered species. Learn more about the animal welfare movement, its goals and motivations in the following pages.