Panzer, I beg to differ, read up!!...
The statistics bear this out. The estimated 300,000 hybrids and captive wolves in the USA killed 10 people between 1986 and 1994 (about 1.25 deaths/year/300,000 hybrids) and injured many more. In contrast, the 50 million dogs in the USA killed an average of 20 people/year (about 0.11 deaths/year/300,000 dogs). Put another way, captive wolves and hybrids are 11 times more likely to fatally maul a human than a dog is. Additionally, bear in mind that many of those 300,000 hybrids actually have little, if any wolf in them. If the statistics were only for wolves and genetically high-percentage wolf hybrids, the rate of fatal attacks would be much higher.
Sometime between 20,000 and 100,000 years ago, a few wolves began scavenging around human encampments. Since that first association, humans have exerted great selective pressure (some consciously, some not) for canines that are less skittish, territorial, predatory and aggressive than wolves. Research has determined that the hormonal systems of canines with these traits (i.e. dogs) are different from those of wild canids. Those hormonal differences cause profound differences in behavior; they result in an animal that never really behaves like a mature canine. In a nutshell, a dog is a wolf in arrested development; they act very much like adolescent wolves their whole lives. An adolescent wolf is playful, adaptable, and able to form bonds with other species, takes directions readily, and is far less territorial and predatory than an adult wolf-all traits that make dogs such delightful companions. As an adolescent wolf's hormonal system reaches maturity (between 18 months and three years), it begins to exhibit all those normal adult behaviors that make wolves so difficult to deal with in captivity (see question #6).
So, while many taxonomists recognize the dog as a subspecies of the wolf and the genetics of the two are quite similar, it is a misconception that these facts prove the wolf and the dog are the same animal. When hybrid breeders and enthusiasts argue that wolves and dogs are essentially the same because they share so much common genetic material, stop to consider this: ninety-eight and four-tenths percent (98.4%) of the genetic material in humans and chimpanzees is identical, yet our behaviors are radically different. Certainly no one would promote crossbreeding humans and chimpanzees as a way to create an animal that is "the best of both worlds."
Dominance: As puppies, wolves and hybrids readily accept domination by their human owners. This makes sense because under natural circumstances a wolf pup's survival depends on its willingness to submit to elder pack members. However, by the end of their second year they have matured sexually; it is at this time that they often challenge their owners for the dominant role. In the wild, wolves have a strong incentive to become dominant because usually only the strongest female and male members of the pack-the alphas-breed. Subordinate pack members may attack a dominant wolf that displays signs of weakness. In interactions with its human "alpha," a captive wolf or hybrid may interpret clues as subtle as fatigue, frustration, or a twisted ankle as weakness and initiate a dominance battle that is potentially lethal. Dominance battles also occur between wolves, hybrids, and their canine companions, be they dogs, wolves or hybrids. In the wild a subordinate wolf may choose to leave, but obviously this avoidance behavior isn't an option within the confines of an enclosure. Therefore, it is not unusual for captive wolves and hybrids to seriously injure or kill pen mates. Additionally, the proper social manners of a wolf or hybrid can harm a child. When two wolves greet, they lick faces, bite muzzles, and straddle one another to communicate dominance. Such "greetings" from an animal that weighs 100 pounds or more can easily frighten and potentially endanger a child.
Predatory behavior: In North America there has never been a verified account of a healthy, wild wolf killing a human. Unfortunately, this is not the case with captive wolves and hybrids. A child running, screaming, stumbling or crying may trigger a predatory response (even in an animal that has always been "great with kids"), resulting in serious injury or death of the child. Once this predator-prey response has been stimulated, the animal may never again view children as anything but prey. Other animals also arouse wolves' and hybrids' predatory instincts. Cats, small dogs, chickens, sheep and other domesticated animals are not safe in the presence of a hybrid or captive wolf. While we all know many dogs who exhibit this behavior, it is to a lesser and much more controllable degree.
Scent marking, "destructiveness," possessiveness, excessive shyness, pacing, digging, howling: Several other wolf characteristics, while not necessarily dangerous, constitute behaviors undesirable to humans. Scent marking (urination and defecation) may occur anywhere the wolf or hybrid wishes to establish territorial boundaries, which may include the living room sofa. Chewing behavior is another common complaint of hybrid owners, as jaws powerful enough to crush the femur bone of an adult bison quickly dissect any interesting object. An owner rapidly learns that once a wolf or hybrid has taken possession of a favorite shoe, no amount of discipline will help recover it, and an attempt may in fact lead to a serious bite. To a wolf, possession is 100% of the law; YOU DON'T TAKE THINGS AWAY FROM A WOLF OR HYBRID unless you're prepared for a fight. Additionally, wolves and hybrids are often quite suspicious and uncomfortable around objects they weren't exposed to as puppies (again, a powerful survival adaptation in the wild). Things that most dogs take in stride, such as umbrellas, people wearing backpacks, overhead ceiling fans, or who-knows-what can panic wolves and hybrids. Extremely shy animals may panic simply at the approach of a stranger. Frightened wolves and hybrids have been known to scale fences that had contained them adequately for years. Panic can cause destruction of property, injury to the animal or loss of control of the animal with resulting injury to someone else. Finally, wolves and hybrids are active and curious. If not given plenty of exercise and mental stimulation (several hours daily-especially during their most active times, dawn and dusk), they can be depended upon to continually pace, move prodigious quantities of earth and howl incessantly.