Burt Prelutsky

A man can not bear the idea of ever having to put down another dog, so he simply decides never to allow anotherdog to nuzzle its way into his life. In order to spare himself pain, he decides he will deny himself the joy only a dog can bring. But he meets Angel and  learns as so many others have  in the past, man plans and Fate laughs. It's not a mere coincidence God spelled backwards is dog.