Welcome, Your AccountLog OutBy Ashley Siu SAN FRANCISCO -- You've heard the saying, "A dog is a man's best friend."A man from Nashville, Tennessee loved his dog so much, he made her the beneficiary of a trust fund.When Bill Dorris passed away late last year, his 8-year-old border collie Lulu inherited $5 million.Dorris' will named his friend, 88-year-old Martha Burton, as Lulu's official caretaker. The will also states that Burton will be reimbursed for reasonable monthly expenses.Burton said she often looked after Lulu while Dorris was away for business."I don't really know what to think...…Welcome, Your AccountLog OutBy Ashley Siu SAN FRANCISCO -- You've heard the saying, "A dog is a man's best friend."A man from Nashville, Tennessee loved his dog so much, he made her the beneficiary of a trust fund.When Bill Dorris passed away late last year, his 8-year-old border collie Lulu inherited $5 million.Dorris' will named his friend, 88-year-old Martha Burton, as Lulu's official caretaker. The will also states that Burton will be reimbursed for reasonable monthly expenses.Burton said she often looked after Lulu while Dorris was away for business."I don't really know what to think...WW…