People who keep dogs relegated to a solitary life in the back yard shouldn't have dogs of any breed or age. All dogs need companionship, mental stimulation, physical activity, training, grooming, affection & commitment. There are people who have the wrong breed & can be directed to a more suitable breed. Too often I see people who should not have a dog at all. Some of em would do all right with cats. All too many are barely suited to pet rocks. Way, way, waaay too many are serial owner/dumpers who acquire a dog, blame the poor beast for being too big, furry, untrained, active etc, dump it & get a 'better' dog, which almost invariably suffers the same fate.
Every time I see that noble animal in a back yard next to its overturned food bowl staring out beyond the fence, its fur matted with dirt I cringe.