Why Are Puppy Eyes So Irresistible?

The video explores how domestication has shaped dogs' facial muscles, particularly the Levator angularly oculi medialis, enabling them to communicate with humans through expressions like the inner eyebrow raise. This trait, absent in wolves, enhances the human-dog bond by triggering oxytocin release. Dogs have more fast twitch fibers than wolves, allowing rapid facial movements for expressions and barking. Selective breeding favored dogs with human-like expressions, strengthening our emotional connection with them.

In what ways do dogs use their facial muscles to better relate to humans?

What findings suggest that fast twitch muscles in dogs help them communicate more effectively with humans?