DOG TROUBLE.

Four years ago, I was in a relationship that everyone who cared about me considered abusive. I was covered with bruises and scars. When my older son came home from college, he was greeted with a scene of loud, belligerent menace. My younger son, who still lived with us, tried to reach out, but more often than not his kindness was met by violence. My mother was terrified and refused to set foot in our house. In fact, no one came to visit us anymore. Nor were we welcome at anyone else's house. Even a short walk on the street held the threat of an ugly brawl. At night, I lay in bed, felt the warmth of his body beside me, and tried not to move. I didn't want to set him off. He was volatile, unpredictable. But I felt responsible for him. And, against all odds, I loved him.

He was not my husband, with whom I had just split up. Nor was he my boyfriend. (I had made one of those unforeseen middle-aged discoveries and was living with a woman.) My looming, destructive, desperate, and compelling companion was not even a human being. He was a dog. Or, as my friends and family pointed out, he was "just" a dog.

He appeared to be a lovely little dog, about two and half years old, when we first saw him. It was a spring day, and he stood at the end of a long line of caged dogs in a Los Angeles pet-supply store, all strays to be adopted, all barking and yapping and hurling themselves against their wire enclosures. But he neither barked nor yapped. He stood politely, his head cocked expectantly. He wagged his tail in vigorous anticipation. When I picked him up, he squirmed with joy and lunged, ecstatic, licking my face, overwhelming me with a wave of urgent, instant love.

"Why do you want a dog?" my mother asked me. "I know why you want a dog. Because your son is going to college." She looked at me pityingly. "When you went to college, I got a geranium."

Buster, which is what we named him, was a seventeen-pound bowlegged mutt with a nondescript coat of short brown hair and a bulldog chest. His tail was far too long for his body, a dachshund's tail. One ear stood up, the other flopped down. His face had the big, worried eyes of a Chihuahua, the anxious furrowed brow of a pug, and the markings of a German shepherd. He yodelled like a beagle and shook his toys with the neck-wrenching vigor of a pit bull terrier. A tough stray missing two toes on his left hind foot, he had been picked up in South L.A. and dumped in the city pound, where, we were told, larger dogs stole his food, until, the day before he was to be euthanized, he was saved by a private rescue group that tried to find a home for him. After we discovered Buster, a representative of the group came to our house to make sure it was safe for the dog. She neglected to tell us that the dog was not safe for us. Perhaps the rescuers were blinded by hope, since we had lifted the dog from his crate and hugged and kissed him with no ill effect. Perhaps they were confused. They had so many dogs to place in homes. Perhaps they were simply desperate.

I grew up reading books about heroic collies. It was from the novels of the popular writer Albert Payson Terhune, treasured by my father before me, that I learned the word "puttee." Terhune would don a pair to walk through the grounds of Sunnybank. I also learned about "carrion," in which his dogs would roll luxuriously, and a "veranda," on which they would sit of an evening, curled contentedly at the feet of their god. Sunnybank was two generations and several classes and ethnic groups away from my world. Terhune, who in the books referred to himself as the Master, raised collies on a sprawling estate in northern New Jersey, which in his novels was called The Place. As impeccably bred as Sunnybank Lad, the Master claimed ancestors who had come to the New World from Holland and England in the seventeenth century. Terhune heatedly defended the rights of dogs and trees, but he was not a man of the people. There is a wonderful story by James Thurber describing the Master's highborn rage ("like summer thunder") when a Mr. Jacob R. Ellis and family, Midwestern tourists come to take a gander at Sunnybank in their Ford sedan, ran over the beloved champion Sunnybank Jean. And the Master's disgust for Negroes and the "rich city dweller of sweatshop origin" was virulent and unashamed. But I noticed none of that as a child, for we had collies, too. Our patient, plodding dogs with their matted ruffs in no way resembled the grand animals of the novels, but they did follow my brother and me protectively around the neighborhood. Would they have leaped at the throat of an attacker, like Buff of "Buff: A Collie" or Lad in "The Juggernaut"? Would they have instinctively guided stolen sheep back into their proper herd? Or wandered for months, living on squirrels, looking for me, their only true Mistress? One of them took long walks every day with an inmate from the sanitarium just down the road. They herded children during recess ...