10 to 13 years
Chihauhuas are normally referred to as the breed with the longest lifespan. They average 15-20 years and are one of the smallest dog breeds. The oldest Chihuahua on record 1, Megabyte, died at the age of 20 years and 265 days. The Australian Cattle Dog is known for having one of the longest life expectancies. There are records of Australian Cattle Dogs living past 20 years old. Research shows that larger dogs live for a shorter period of time when compared to smaller ones. For example, an Irish Wolfhound (average 115 lbs) has an average lifespan of 7 years, while a Jack Russell Terrier (average 15 lbs) can live up to 13-16 years. I had heard the average life expectancy for this breed was 6 years…on this list it’s 7 years. Either way this is a short life expectancy for a dog and while on the larger side at 85-110 pounds it’s still not near the size of some of the other breeds on this list. I would consider the Bull Dog a medium size breed at 50 – 55 pounds and you would expect a dog of that size to have a better than average life expectancy. Unfortuantely, according to the list above the Bulldog’s average life expectancy is only 6.7 years. The natural life span of the Border Collie is between 10 and 14 years, with an average lifespan of 12 years. The median longevities of breeds of similar size are usually 12 to 13 years. Leading causes of death are cancer (23.6%), old age (17.9%) and cerebral vascular afflictions (9.4%).  The average max. life expectancy or a Border Collie is 14 years.  Caring For The Senior Collie. On average, Collies typically live 10 to 13 years, but many go well beyond the age of 13 and I have heard of a few Collies reaching 15 and beyond. Generally it is thought that the smaller the dog, the longer lived and the bigger the dog, the shorter lived. Just like with people, old age is relative.  Life Span. Border Collie lifespan is naturally from 9 years to 17 years. The average lifespan for a Border Collie is 12 years. The leading cause of death for these dogs are cancer at 23.6%, old age at 17.9% and cerebral vascular afflictions at 9.4%. :(She is about 13-14 years old and I would like to take her in and give her a warm home and make her life more comfortable for the little... show more She has been a farm dog all her life and the man that owns her doesn't want her anymore because he says she is too old and is of no use anymore. He wants to shoot her. :(She is about 13-14 years old and I would like to take her in and give her a warm home and make her life more comfortable... Source(s): average life span standard collie lassie border collie: https://tr.im/WqRaQ. Roselia · 2 months ago. Thumbs up If your question is, How long do dogs live? my answer is, The life expectancy of the average dog is about 12 years, with a typical lifespan range of 8-16 years..  Life expectancy is something you should definitely consider before choosing a dog breed. As you can see from this list on average the shortest life expectancy is for the Irish Wolfhound at 6.2 years and the longest is the Miniature Dachshund at 14.4 years. I would consider the Bull Dog a medium size breed at 50 – 55 pounds and you would expect a dog of that size to have a better than average life expectancy. Unfortuantely, according to the list above the Bulldog’s average life expectancy is only 6.7 years.
http://www.caninejournal.com/life-expectancy-of-dogs/ http://puppyintraining.com/whats-the-life-expectancy-of-your-dog/ https://en.wikipedia.org/wiki/Border_Collie http://www.answers.com/Q/What_is_the_average_life_span_of_a_Border_Collie http://www.chelsea-collies.com/older.html http://dogsbordercollie.com/health/life-span https://answers.yahoo.com/question/index?qid=20070218193130AAyhyrZ http://www.yourpurebredpuppy.com/health/articles/dog-lifespan-quiz.html http://puppyintraining.com/whats-the-life-expectancy-of-your-dog/
average lifespan for collie