Animal welfare means how an animal is managed with the condition in which it lives or animal welfare refers to the relationship people have with animals and the duty they have to assure that animals under their care are treated responsibly. Animal welfare denotes the desire to prevent unnecessary animal suffering. Protecting an animal welfare means that providing for its physical and mental needs. This science uses various measures like longevity, disease, immunosuppression, behaviour, physiology, and reproduction. Animal welfare was a concern of ancient civilization but in the 19th century in Britain animal welfare take a larger place in western public policy. In the 21st century, animal welfare is a significant focus of interest in science, ethics, and in organizations like animal welfare.