Also, the brain game should suit your dog's strengths ... with cheap thrills—homemade toys and interactive training challenge dogs to think. Anything that demands extra thinking tires dogs ...

and sprint racing sled dogs, also known as Eurohounds. “We’re looking at the selective breeding as well as the training, and how those two forces are both changing the brain,” Barton said.

By peering into a dog’s brain, researchers are able to see how it reacts to stimuli like hand signals, sounds, and smells. Activity in the reward center can show whether dogs prefer human ...