Cruelty to animals, also called animal abuse, animal neglect or animal cruelty, is the infliction of suffering or harm by humans upon animals, either by omission (neglect) or by commission. More narrowly, it can be the causing of harm or suffering for specific achievements, such as killing animals for food or entertainment; cruelty to animals is sometimes due to a mental disorder, referred to as zoosadism. Divergent approaches to laws concerning animal cruelty occur in different jurisdictions throughout the world. For example, some laws govern methods of killing animals for food, clothing, or other products, and other laws concern the keeping of animals for entertainment, education, research, or pets. There are several conceptual approaches to the issue of cruelty to animals.
Even though some practices, like animal fighting, are widely acknowledged as cruel, not all people or cultures have the same definition of what constitutes animal cruelty. Many would claim that docking a piglet's tail without an anesthetic constitutes cruelty. Others would respond that it is a routine technique for meat production to prevent harm later in the pig's life. Additionally, laws governing animal cruelty vary from country to country. For instance, docking a piglet's tail is routine in the US but prohibited in the European Union (EU).
