It is hard to deny the truly important place pets play in our lives. They are our companions, our friends, and, often inadvertently, our sounding boards. The thousands of Web sites devoted to pet appreciation, care, and merchandise confirm the growing number of pet owners and the power pets hold over them. When it comes to our pets' health and well-being, there's little we won't do -- but the financial and emotional cost can be high.In unique Q&A...