Banfield: spaying, neutering correlate with longer lives.
D000818:Animals; D002415:Cats; D003625:Data Collection; D004285:Dogs; D005260:Female; D008136:Longevity / Q000502:physiology*; D008297:Male; D009919:Orchiectomy / Q000662:veterinary*; D010052:Ovariectomy / Q000662:veterinary*; D014481:United States