New Vrindavan Mataji
New Vrindavan stopped breeding cows on a large scale back in about 1991. Since the principle is life time protection, there are still close to 100 cows here ages 15 years old and older. The above picture is of a cow I would guessestimate to be about 15.
Most people have never even seen an old cow as the males are usually slaughtered between 18-24 months old and the cows slaughtered as soon as they are economically nonviable, which can be as young as 7 years old in the factory farms that produce most of the milk these days.