Wolves, Dogs, and Their Kin Order Carnivora: Family Canidae Mr. Peck, the yellow dog who shared my childhood, could not let prey pass. Almost any small animal that crossed his path was game: field mice, for which he would dig with ferocious energy, pausing to listen for them in their tunnels; porcupines, despite the beard of painful barbs they left him with; skunks, despite the sewer- and- cabbage smell; cats, even the ones we loved. One day, when our kitten was too slow, Mr. Peck left him dead beneath the Chinese elm he''d been racing for, his black coat littered with bits of leaf and twig. I recalled the rubbery scream I''d ignored hours earlier. I felt guilty for not seeing its importance at the time. Long days of misery followed before I could forgive Mr.

Peck, days during which my mother told me again and again that he was following his nature, that he''d never learned not to hurt cats and couldn''t be blamed for this. Rabbits tempted him above all. Their zigzag escape routes didn''t fool the yellow dog. He often brought one home and lay on the lawn, bracing it between his forepaws as he chewed. The largest jackrabbit I ever saw was his kill, a monster that might still, after two days of his gnawing, have been a red head of lettuce. My mother grimaced at this kill every time she passed him on the lawn. "Pecky, I wish you''d take that elsewhere," she said to him, but he merely turned his head to the side so the jagged carnassial teeth along his jaw could shear off a chunk of meat and bone. Our dog''s carnivory was so much a part of my landscape that I hardly remarked it.

I learned not to walk too close when he was on a kill, lest he growl to warn me off; otherwise, the bones and blood were routine. What made me notice them afresh was a new item on his menu. Strung through the buffalo grass of our backyard was a skeleton, dragged into disarticulation, the meat mostly gnawed off. The size of the thing startled me--bones strung out for a dozen feet, white in the sun except where they were filmed with red. At the end of the string Mr. Peck lay struggling with a femur. He put its bulbous end between his jaws and bit, but the thing went sliding out the side of his mouth with a clatter. I found no skull, and had to ask my mother to identify the animal.

"A steer," she said. "Is Pecky supposed to kill the steers?" I said. "He didn''t kill it. It was already dead when he found it." "What killed it?" "Coyotes, probably." The next stage in my education about dog carnivory came with the visit of our neighbor''s dog, a broad- chested border collie. I enjoyed its presence at first, because it was always game for a chase. Border collies generally are: they must herd, and will try to guide and turn running geese or sheep or children--even, I have read, a string of ants.

This border collie cavorted with my dogs and me, always pushing its side against me to keep me with the pack. But then it began to kill our hens. We had six of them, five white leghorns and a slender auburn one. They died one at a time, and I would go out after school and track them by the feathers they lost as the border collie chased them. "Shoot him if you have to," our neighbor said. He was a kindly old man with great patience for children. "I got cattle, so I can learn him off of them, but I can''t learn him off of chickens." It was a delicate point of etiquette, the shooting of someone else''s dog.

Letting your dog roam free was a major attraction of country life; your dog''s freedom represented your own. But costing someone else his livelihood had consequences. I relayed the permission to my parents. They said we''d be moving soon, that we would have to get rid of the chickens anyway, so there was no need to hurt the dog. One day I found my favorite hen, Fat Feet, near death. Her feet had always looked like the tubers of irises, extravagantly fleshy even for a white leghorn. I found her in the carport beside Dad''s shop. The border collie did not eat the chickens; he only chased them down to kill them.

Fat Feet had hated being handled before, but now when I touched her she raised her head and looked at me and slowly put her head back down. She made low sounds, like the raw material for her normal clucks. I had a vague impression of blood among her white feathers. I told Mom--expecting, I guess, that she could do something to save Fat Feet. She told me to leave the bird alone and let her die. I couldn''t. I went back again and again and stroked her feathers, and she raised her head more feebly each time, and the weird monotone she made grew softer as the afternoon went on. I said things to comfort her, though all promises at this point had to be empty.

Back in the yard I told the border collie to go away. He licked my hand. He was big enough to be an adult, but, as my neighbor had told me, he was still a puppy, and killing was his way of playing. I went back to the carport and found Fat Feet dead. The next day I told my second- grade teacher about the episode. She asked why I hadn''t grabbed the hen up and put her in the freezer. Peck and the border collie were good dogs, but imperfectly trained, each killing certain animals we humans would have preferred they didn''t touch. My mother taught me, in effect, that dogs hunt by instinct; my neighbor''s comment about training taught me that instinct can be shaped to suit our own needs.

I didn''t really understand the border collie''s herding behavior, but that, too, is important: it''s an example of an instinct heightened and refined so that it lingers through generations, though it dissipates when we stop making dogs mate within their own breeds. In fact it is a modification of hunting behavior, the pursuit warped so that capture is less important than the chase itself. In much of the world--the parts where people have extirpated the large native predators--the dog is the most dangerous large animal except for the human being. In the United States, for example, an estimated 4.7 million dog bites occur each year. These bites cause some 800,000 people per year to seek medical help, nearly half of them at emergency rooms. The U.S.

government''s Centers for Disease Control and Prevention, which is the source of these statistics, puts the annual death rate from dog attacks at about a dozen. Other Western countries have similar rates. In the UK, postal workers alone are attacked by dogs at a rate of nearly five thousand a year. People view most of these incidents as something of a different order from, say, an attack by a crocodile or bear. It is this very difference in perception that allows dogs to be a danger. Because we perceive them as belonging among us, we are more vulnerable to them and more frequently hurt by them. Of course, this is only true in gross numbers. The average dog is unlikely to hurt a person, and most bites are minor events.

The most serious attacks tend to involve children (who comprise half the victims of medically significant bites) and old people. These victims are, of course, less able to defend themselves once an attack is launched, but that''s only part of the reason why they are disproportionately victimized. The main reason lies in the social structure of wolf packs. The dog, despite the remarkable diversity of its body types, is simply a kind of wolf. Wolf packs are structured partly according to a dominance hierarchy, with stronger, more intimidating animals taking roles of privilege and leadership. These roles within a pack are always subject to revision. A low- ranking wolf can improve his standing by outfighting or cowing a higher- ranking one. In the right situation, a wolf will instinctively attack a pack mate of higher standing who looks weak, even if only momentarily.

For example, if a wolf is injured in a hunt, he becomes a target of his social inferiors. A domesticated dog seems to see itself as a low- ranking member of human society. Most dogs settle happily into their subordinate roles, once those roles are made clear to them. But this is not always the case. Sometimes dogs well past puppyhood try to rise socially by hurting children. I have known badly trained puppies to constantly rough up the youngest children in a house. The puppy is trying to improve his rank by establishing his dominance over the child. I''ve even known badly trained puppies to attack the adults in a household when they bend to pick something up.

Bending over seems to the dog a sign of weakness or submission. A setter I knew had lived amicably with my friends for years. One day he approached the four- year- old girl, who was just tall enough to look him in the eye. He opened his mouth and seized her face. Her father kicked the dog and pursued it into the woods. The girl was left with a scar on her lip. The family was broken up, the human members remaining, the setter exiled to live with other people. Traumatic as it was for all concerned, this scenario is commonplace.

Fifty percent of dog bites to children are on the face. It is the eyes that provoke them; a direct gaze is a claim of social superiority, and the dog may challenge that claim from the weakest member of a human pack. Old people are vulnerable when they appear infirm. An unsteady walk, for example, is a classic mark of weakness in wolf society; it will often draw a challenge. Possibly a quavering voice strikes a dog''s ear as a similar mark. Some dogs are, of course, bred for attack. Just as the border collie I knew would try to herd children, running alongside us to control our paths, other dogs have a heightened desire for inflicting injury. This is simply a different part of t.