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Governed by the "Three Rs" framework: Replacement (using non-animal models wherever possible), Reduction (using fewer animals to obtain the same amount of data), and Refinement (modifying procedures to minimize pain and distress).

Animal rights advocates reject the premise that animals are property or commodities for human utility. This philosophy argues that animals possess inherent value and certain fundamental rights—most notably, the right to life, liberty, and freedom from exploitation. Animal Sex Girl Fucks A Pig -bestiality Sex-.wmv

Some researchers frame the movement through the lens of broader societal ethics and political theory. Governed by the "Three Rs" framework: Replacement (using