Animal welfare

Animal welfare refers to the quality of life and overall well-being of animals. It is a complex subject that involves many different fields of study. Experts debate the best ways to measure welfare, but they often look at specific biological indicators. These indicators include longevity, which is how long an animal lives. Scientists also study disease, reproduction, and physiology, which is how an animal's body functions. They examine immunosuppression, a state where an animal's immune system is weakened. Researchers also watch animal behavior to see how they react to their surroundings.

Much of this work is based on the concept of sentience. Sentience is the ability to feel things like pain, pleasure, or distress. Most modern neuroscientists believe that consciousness exists in nonhuman animals. This means animals have an internal experience of the world. While some philosophers still debate the exact definition of consciousness, the scientific community largely accepts it. This belief drives people to consider how animals are treated in various settings. We see these concerns in scientific research, pet ownership, and zoo management. It also applies to how humans treat animals used for food or circus performances.

There are different philosophical views regarding how humans should interact with animals. Some historical thinkers argued that humans have no duties toward animals at all. On the opposite side is the animal rights position. Animal rights proponents believe that animals should never be treated as objects. They argue that any use of animals by humans is unacceptable. Some people in this group believe that improving welfare is just an excuse to keep exploiting animals. Others see welfare improvements as small, necessary steps toward achieving full animal rights. This tension creates a divide between those who want better treatment and those who want no human use of animals.

Humans have enacted animal protection laws for thousands of years. In the 1st millennium BCE, India saw the rise of animal protection. Emperor Ashoka, who ruled from 304 to 232 BCE, issued orders against hunting and slaughter. He followed the doctrine of ahimsa, which means non-violence. In the 13th century, Genghis Khan protected wildlife in Mongolia during breeding seasons from March to October. Western laws appeared much later. In 1635, the Ireland Parliament passed an act against pulling wool off living sheep. In 1641, the Massachusetts Colony included protections for "brute creatures" in their laws. In Japan, Tokugawa Tsunayoshi created laws for dogs during the Edo period.

The modern animal welfare movement grew significantly in the 19th century. In 1822, Richard Martin helped pass the Cruel Treatment of Cattle Act in England. This protected cattle, horses, and sheep. In 1824, Martin helped found the Society for the Prevention of Cruelty to Animals, or SPCA. This was the world's first animal welfare organization. In 1840, Queen Victoria gave the group her blessing, and it became the RSPCA. These organizations used donations to hire inspectors. These inspectors gathered evidence of abuse and reported it to authorities. Similar movements appeared in Germany in 1837 and the United States through various state laws.

In the late 20th century, new guidelines changed how we think about farming. In 1965, the UK government investigated the welfare of intensively farmed animals. This followed a book called Animal Machines by Ruth Harrison. This led to the creation of the Farm Animal Welfare Council in 1979. The council developed guidelines known as the Five Freedoms. These freedoms state that animals must be able to stand, lie down, turn around, groom themselves, and stretch. Today, many groups campaign for a Universal Declaration on Animal Welfare at the United Nations. They want the UN to recognize animals as sentient beings. This would make animal welfare a part of global social development.

Modern farming practices present specific welfare challenges, especially in factory farming. In these systems, large numbers of animals are kept in high stocking densities. This confinement can lead to abnormal behaviors like tail-biting or feather pecking. Some animals, like broiler chickens, are bred to grow very large very quickly. This fast growth can cause leg deformities because their muscles grow faster than their bones. In the UK, up to 20 million broilers die every year from the stress of transport. Stress can be measured by high heart rates and cortisol levels. Other concerns include the method of slaughter and the culling of male chicks in the egg industry.

We also see welfare issues in how humans interact with marine life, specifically cetaceans. Cetaceans are animals like whales and dolphins. In captivity, they are often kept in concrete tanks for research or display. While staff provide food and health exams, these environments can be difficult. Concrete tanks can echo natural sounds back to the animals. In the wild, researchers study cetaceans in their natural habitats. However, boat engines can create noise that interferes with their ability to echolocate. Echolocation is how they use sound to navigate and communicate. Using electric engines could help reduce this noise, but they are not yet widely used.