Australian Cattle Dog: The dog who holds the Guinness record for longest life span was an Australian Cattle Dog named Bluey, who lived to be 29 years old. Thatâs astounding. I donât know of any ACDs who have approached that record, but I do know this breed can live a good 12 to 15 years, sometimes longer.
Diabetes Mellitus is a major risk factor for Peripheral Arterial Disease. A leg turning black and cold may be a sign of severe arterial insufficiency resulting on gangrene. Also, another condition called Venous Insufficiency may cause the leg to turn dark red or bluish when the person is in a sitting or standing position. Gangrene.
Non-Traumatic Injuries. There are several other causes of toenails turning black, which include systemic chronic health problems, chronic ingrown toenails, and fungal infections. There is also a rare more serious cause of black discoloration of a toenails resulting from cancer known as malignant melanoma.