Separation anxiety is one of the most common problems that dogs develop. It’s an anxiety disorder, and is defined as a state of intense panic brought on by the dog’s isolation/separation from her owner(s)

A dog is an instinctively aggressive creature. In the wild, aggression came in very handy: dogs needed aggression to hunt, to defend themselves from other creatures, and to defend resources such as food, a place to sleep, and a mate. Selective breeding over the centuries has minimized and refined this trait significantly, but there’s just no getting around it: dogs are physically capable of inflicting serious harm (just look at those teeth!) because that’s how they’ve survived and evolved. And Mother Nature is pretty wily – it’s hard to counteract the power of instinct!