Some dogs exhibit signs of ADHD, just like humans

James Serpell of the School of Veterinary Medicine said he errs on the side of caution when it comes to treating dogs’ mental health issues with pharmaceuticals. "Don't use these drugs on animals unless it's really necessary in order to calm the animal down and prevent the worst symptoms of anxiety,” he said, “and try to think of it as a short-term thing, something that you would do for a while until you find a more satisfactory way of coping with the problem through behavior modification and things like that."

・ From Salon.com