(Image credit: Getty Images) Question: I'm a 74-year-old widower with about $1.5 million in my retirement account. About a year ago, I brought home a Chihuahua named "Peanut," who has given me great joy and become my constant companion. Unfortunately, I can't say the same for my two adult children, who quite honestly can't stand Peanut. Since Chihuahuas can live up to 20 years, and I don't trust my kids to take care of Peanut when I'm gone, I'm worried about what will happen to her. How can I make sure Peanut is cared for when I pass? I'm willing to pay someone if that's what it takes. Answer: First of all, congratulations on joining the 87 million dog owners in America, who find happiness and companionship through pet ownership. Understandably, you are worried about Peanut's well-being if she outlives you. Caring for a pet is a big responsibility and an expensive one, so you can't blame your adult children for not wanting to take on the burden.…