Can Old Dogs Learn New Tricks?

As we age, cognitive functions like memory begin to decline. To combat this, some seniors play "brain games" to keep their minds sharp.
 Researchers in Vienna think dogs may be able to get the same benefit.
Except instead of sitting down to a crossword puzzle or working on a sudoku, cognitive scientists have trained dogs to respond to a touchscreen. They're calling it "dog sudoku" (though it's not conceptually similar to the numbers game), and they hope it may one day be used in the home to increase a dog's quality of life by combatting boredom and restlessness.
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