English masstifs being a large breed of dog usually tend to live to around 7-10 years of age because of their size but it has been known to live to about 15 years of age.
Big dogs don't live as long as smaller dogs. The English Mastiff will live for about 6 to 10 years. 12 years old or 11 years old is considered a long life for this breed. If you're looking for a long...