Sweep just turned 7 last month. She had a long bout of limping over the past year that was eventually determined to be an old racing injury that she kept re-aggravating, leading to tenosynovitis and some arthritis in a toe. I won't lie: it was expensive because it took so long to figure out what was going on and then to treat it with drugs and physical therapy. But now she is off meds and totally healthy (knock on wood). She has never needed a dental or stitches or even had a bout of diarrhea last longer than a day or two. As someone suggested above, having a fenced yard can be both a convenience and a liability. It's possible that we'd never have dealt with the toe issue if we were still in the townhouse we lived in our first two years with her, where she had no area to run. We still leash-walk every day, but she takes full advantage of the yard for zoomies and that means a higher chance of injury.