Acupuncture in dogs works by stimulating specific points on the body, which are actually nerve clusters. When thin needles are inserted at these points, they trigger the release of natural hormones, including endorphins and painkillers. This response helps reduce pain, alleviate stiffness, and promote healing. Additionally, acupuncture improves circulation and increases oxygenation to cells, which further supports recovery and overall well-being. While rooted in Traditional Chinese Medicine's concept of energy flow, modern veterinary practice understands these effects through the lens of neurophysiology and hormone release.