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He was self-rewarding. The seeking system in his brain—the dopamine pathway that makes the act of finding inherently pleasurable—had rebooted.

One of the most exciting areas of research in veterinary science is the study of animal emotions. Scientists are now using advanced imaging techniques such as functional magnetic resonance imaging (fMRI) to study the neural basis of emotions in animals. This research has shown that animals experience emotions such as joy, fear, and empathy in much the same way as humans do. He was self-rewarding