[ted]

absolutely outdoor pets experience many more life shortening dangers than indoor pets.
c&p
Pet health. Outdoor dogs can escape from the yard, facing danger in the form of traffic, poisoning, or fights with other animals. Chronic health problems can develop from cold or heat exposure. Because outdoor dogs are less socialized, they are more likely to be given to shelters. In addition, outdoor dogs are more likely to be put down.
Behavior problems. Dogs that are outside pets are more stressed and develop behavior problems such as barking, digging, escaping, and being overly aggressive. This makes them harder to train and easier to give up.
Outdoor options. Dogs need exercise. The best way to get them outside is to be outside with them, walking or playing. If you leave your dog outside for short periods, make sure to provide a safe, escape-proof shelter, shade, and fresh water. Never chain your dog. Remember that dogs with heavy coats don't do well in the heat, and short-coated dogs do not do well in the cold.