Video of 21-Year-Old Dog ‘Doing the Zoomies’ Delights Internet [Video]

A 21-year-old dog has captured hearts online after a video showing him bounding around a backyard with youthful energy went viral on Reddit.

The post, titled “My 21-year-old good boy, doing the zoomies,” was posted by u/valulaa and has received more than 15,000 upvotes since it was shared on March 19.

The video clip features the senior dog eagerly hopping across a grassy yard, despite his advanced age and a history of arthritis. “Arthritis kicked in many years ago, but he just keeps on giving,” the owner wrote in a caption alongside the video.

Dogs are considered “senior” when they reach 75 percent of their expected lifespan, veterinarians Ryan Llera and Krista Williams explained in an article for VCA, the animal hospital chain.

As dogs age, they often experience medical conditions such as osteoarthritis, which can reduce activity and diminish their quality of life. “Keep track of your dog’s energy levels, especially how …