I liked the book, and I cried, because it is sad. However, I always hate people saying that dogs have feelings because this is so obvious to me that talking about it seems unnecessary and odd. I agree with Koontz that dogs have feeling and spirituality equal to that of people, but I don't agree that dogs are more innocent than people. I think Koontz's arguments in favor of dogs (an example: that nature does not waste and if intelligent being by their very nature seek meaning, then there must be meaning to be found) are non sequiturs. The book would have been better if the arguments were more under-stated, or if they weren't stated, and Koontz just stated what he has come to believe.
The dog in the book is wonderful, both very loving and very intelligent, and it is a joy to read about her life with the the author and his wife.