It’s official: a second pet is the best medicine for your dog’s health. New research says dogs with pet companions live longer, healthier lives. The study from the Dog Aging Project suggests that the secret to a healthier, longer life for your dog might just be a furry friend. Researchers analyzing data from over 21,000 dogs found that those living with another animal-especially another dog-were consistently rated as healthier than their solo counterparts. These dogs had fewe