Plus, aside from getting a great companion, you just plain feel good about adopting a grown dog whose fate is otherwise uncertain at best. Adult dogs require less work than puppies do. As cute as puppies are, they are a lot of work. Aside from having to be housetrained, puppies teethe, chew, and need much more exercise and attention than adult dogs. And the work doesn't last for just a few weeks.
Many breeds have the characteristics of puppies until they are well over two years old.
Retired racers are great house mates. Retired racers are low-maintenance. They're compliant and have a personality that helps them adapt quickly to a new lifestyle. Most Greyhounds are naturally laid-back, well mannered, and sensitive. Plus, they're intelligent and respond well to the right training methods.