Puppies are darling and so much fun to watch at play, but they are also a lot of work. Much like grandchildren they are best when you can choose when to have them around and then when to send them home with their parents. And they can be dangerous around someone who does not move quickly any more. A senior can trip over a fast moving puppy and both can be seriously hurt. Housebreaking takes a lot of time and patience.
Any puppy requires a lot of time and training.
Their lives are moving at a different speed from a senior. The senior dog is at the same place in his life that the human senior is in his. If given love and caring, they can make the change to a new home with few problems. Their needs are usually simple and they are happy with a quiet and uncomplicated life. Remember, they are often set in their ways and not interested in learning a lot of new things.