A relaxed, undrugged dog patiently waits its turn in the MRI scanner. The scientists' trick: Make it seem fun. Enikő Kubinyi/Science hide caption
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What did she say? Eniko Kubinyi/Science hide caption
Screenshot from a YouTube video posted on Dec. 8, 2015, by Lance Ellis of a toddler painting with the tail of the family dog. YouTube hide caption
Ginger, an English bulldog, stands watch while at work with her owner, Will Pisnieski, at Authentic Entertainment in Burbank, Calif., in 2012. According to the Society for Human Resource Management, 7 percent of employers allow pets at work. Grant Hindsley/AP hide caption
Veterinarians say that helping suffering animals and stressed-out owners can become grueling. Hero Images/Getty Images hide caption
Diabetes alert dogs are trained to detect low blood glucose in a person. The dogs can cost $20,000, but little research has been done on their effectiveness. Frank Wisneski/Flickr hide caption
Pets are more tech savvy than you think. Benjamin Torode/GFlickr RF/Getty Images hide caption
An image from a CHP video shows a Chihuahua leading officers on a chase across the Bay Bridge. California Highway Patrol/Screen shot by NPR hide caption
Shelter dog Rohan takes a break from his scent detection trials to play outside. Rohan is one of several dogs training to detect homemade bombs at the Canine Science Collaboratory at Arizona State University. Jimmy Jenkins/KJZZ hide caption
Cheryl Woolnough, director of training at Patriot PAWS in Rockwall, Texas, works with Papi, a Labrador retriever. Lauren Silverman/KERA News hide caption
The puppies in this litter are the first ever born through IVF Mike Carroll/Cornell University College of Veterinary Medicine hide caption