Most Americans acquire dogs impulsively and for dubious reasons: as a Christmas gift for the kids. Because they saw one in a movie. To match the new living-room furniture. Because they moved to the suburbs and see a dog as part of the package.

Animals have come to mean so much in our lives. We live in a fragmented and disconnected culture. Politics are ugly, religion is struggling, technology is stressful, and the economy is unfortunate. What's one thing that we have in our lives that we can depend on? A dog or a cat loving us unconditionally, every day, very faithfully.

I think of animals more as spirits that come and go. They enter our lives at a particular time and they leave at a particular time. The whole glorious history of animals with people is about joy and connection. It's about loving this creature and letting this creature love you.

When I wrote about media and technology, I had a lot of lonely, even intimate book talks. Since writing about dogs, I have a lot of company at book signings.

It's important to remember that the animals are not grieving with us. They're very accepting. They're not lying there thinking 'How could you do this to me? Why aren't you keeping me going?' Pets don't do the human things of guilt and anger and recrimination that we do. They come and go with great acceptance.

Taking responsibility and having faith in your own judgment will help you make good choices and decisions at the end of your pet's life.

It's natural canine behavior to chew on all sorts of things, roll in other animals' droppings, hump and fight other dogs, menace anything that invades the home. All these behaviors can be curbed, but that takes a lot of work. Trainers say it requires nearly 2,000 repetitions of a behavior for a dog to completely absorb it.