Dog behavior

Dog behavior is how dogs act and react to things around them, both inside and outside their bodies. Over many years, dogs have lived with humans, which has changed how they act and think. Because of this, dogs have learned special ways to understand and talk with people.

Scientists who study behavior have found that dogs can think and feel in smart ways when they are with humans. Many things affect how a dog behaves, such as its body, where it lives, and how people treat it. All these parts help make each dog’s actions and feelings unique, which is important for keeping dogs healthy and happy.

Co-evolution with humans

Main article: Origin of the domestic dog

We are not exactly sure how dogs first became our friends. But we do know that dogs, gray wolves, and an ancient type of wolf called the Taymyr wolf all separated from each other a very long time ago, between 27,000 to 40,000 years ago.

There are two main ideas about how dogs became pets. One idea is that dogs tamed themselves. The other idea is that humans helped tame them. What we do know is that over time, humans and dogs changed their behaviors to live better together.

Intelligence

Main article: Dog intelligence

Dogs are very smart animals. They can learn new things by watching and thinking. For example, a dog named Rico could learn the names of many different items and even guess new names. Another dog named Chaser could learn the names of over 1,000 things and understand commands. Dogs can also understand what people are saying and doing by watching body language and listening to voice commands. When faced with a tricky problem, dogs often look to humans for help, showing they understand people.

Senses

Main article: Dog anatomy § Senses

Dogs have many senses that help them understand the world. These senses include seeing, hearing, smelling, tasting, feeling, knowing their body position, and sensing the Earth's magnetic field. These abilities help dogs explore and interact with their environment.

Communication behavior

Main article: Dog communication

Dog communication is how dogs share messages with each other and with humans. Dogs use their eyes, faces, sounds, body movements, and smells to "talk." Humans can also "talk" to dogs by making sounds, using hand signals, and moving their bodies. Dogs can learn to understand human feelings by looking at human faces.

Social behavior

A dog's behavior can change depending on its size, weight, and skull size.

Play

Dog and dog

When dogs play, it often looks like a gentle fight. They use special signs to show they are playing, like doing a "play-bow" or facing another dog with an open mouth. These signs help keep play safe and fun. Young dogs play a lot, which helps them learn important behaviors. Playing together also helps dogs understand each other better.

Dog and human

Dogs love playing with their owners, just like they love playing with other dogs. How dogs play with humans shows their personality and relationship. Dogs that play gently are usually calmer, while those that start games more often might be a bit more assertive. Playing with humans can help dogs feel more relaxed.

Empathy

Studies show that dogs can show care for others. For example, when a person pretends to cry, dogs often go to them and show comfort, like sniffing or licking. This shows that dogs can understand and respond to the feelings of others.

Personalities

Dogs, like people, have different personalities. Scientists study dog personalities by asking owners about their pets’ behaviors, testing how dogs react to new situations, or watching them in everyday life. Some common traits in dogs include being playful, curious, friendly, and confident. A dog’s breed can influence its personality, but the environment and individual experiences also play a big role.

Leadership, dominance and social groups

Among dogs, dominance means who gets first access to resources like food or space. It isn’t about being the biggest or strongest, but about how dogs communicate and react to each other. When dogs meet for the first time, they act carefully until they learn how the other will react. Over time, they develop expectations about each other’s behavior.

Scent

Dogs have a very strong sense of smell and use scents to communicate. They can learn a lot about another dog by smelling its urine or stool, such as its sex, age, or mood. Dogs often mark their territory by urinating on vertical surfaces, which helps other dogs learn about their size and dominance. They also use special scent glands to leave unique marks on their waste, helping to define their territory.

Feral dogs

Feral dogs live without human care and avoid direct contact with people. They often rely on human environments for food and space but stay away from people. These dogs face many challenges and depend on humans indirectly for survival.

Other behavior

Dogs generally love new things and explore them eagerly. On average, a dog sleeps about 10 hours in a day.

Reproduction behavior

Further information: Canine reproduction

Dogs can start having puppies around their first year. This is earlier than wolves. Female dogs have a special cycle when they can have puppies. During this time, they might show interest in male dogs.

When a male dog wants to mate, the female might let him. After mating, the male and female stay close together for a while. Female dogs can have another litter of puppies within 8 months of their last one. Unlike wolves, dogs often have many mates, which helps them have more puppies.

Behavior problems

Dogs can have different behavior problems, such as growling, barking, or moving into a person's space. Some common problems are getting too excited or jumping up on people. These problems can be related to how much a dog loves its owner or to the dog's brain and nervous system.

One issue is separation anxiety, where dogs feel very upset when left alone. This can lead to behaviors like being destructive or making loud noises. Dogs with separation anxiety may panic if left alone for even a few minutes. There are ways to help, such as giving dogs chew toys, playing calming music, or doing short training sessions before leaving.

Another problem is resource guarding, where a dog tries to control items like food or toys. This can lead to growling or barking if the dog feels threatened. Owners should watch their dog's body language to understand these feelings. Teaching the dog to let go of items can help reduce aggression.

Dogs can also feel jealousy, especially if they sense attention is being given to another animal or object. This might lead to attention-seeking behavior. Noise anxiety is when dogs get very scared by loud sounds like fireworks. Some dogs may chase their own tails, which can be a sign of obsessive behavior. With the right care and training, many of these behavior problems can be managed.

personal space separated from humans Noise-related anxieties Tail chasing stereotypy terriers clomipramine

Behavior compared to other canids

Comparisons with wolf-like canids help us understand which behaviors dogs inherited from their ancestors and which developed because of living with humans. Studies of African Basenjis and New Guinea Singing Dogs show that their behaviors and ways of living are shaped by their environment and breeding choices, not just by humans.

Dog puppies start playing with each other around two weeks old, but they don’t hurt each other because their jaws aren’t strong yet. By four to five weeks, they start chasing each other. Wolf puppies can bite more strongly from two weeks old and start serious play-fighting at four to six weeks. Golden jackal puppies turn aggressive around four to six weeks, but this stops by ten to twelve weeks when they learn their place in the group.

Dogs were first chosen by humans for their friendly behaviors. A study in 2016 found only eleven genes that differ between wolves and dogs. These genes affect how dogs handle stress and emotions, making them less fearful and aggressive than wolves.

In the wild, groups of dogs usually aren’t related, unlike wolf packs. Feral dog groups have two to six members, while wolf packs can have up to fifteen. Feral dogs have one breeding pair, like wolves, but their groups don’t have a complex social structure.

Dog and wolf puppies can see, hear, and smell by four weeks old, but wolves start exploring the world earlier, at two weeks, even though they can’t see or hear well yet. This makes the world more frightening for wolf puppies. Dogs need about 90 minutes of human contact during this early period to form a bond.

Studies show that both dogs and wolves can learn to understand humans if they grow up together, but dogs often pay more attention to people. After training, dogs usually look to humans when faced with a hard problem.

Dogs can reproduce at one year old, while wolves take two years. Female dogs can have another litter eight months after the first. Unlike wolves, dogs don’t form strong pair bonds and don’t help raise each other’s puppies. This lets dogs have more puppies more often, which helps their populations grow quickly.

Unlike wolves, most dogs don’t bring back food for their puppies, though some do. In some groups of free-living dogs, males help protect and even feed the puppies.

Feral dogs use areas similar to other wild canids, with spaces they defend and areas where they spend most of their time. City dogs have smaller spaces than feral dogs, who use much larger areas. Wolves also defend their spaces, but it depends on how much food is available.

Dogs in human society

Further information: Human-canine bond

Humans can shape dog behavior with food, gentle touches, and kind words. Dogs enjoy these things and like to stay close to people who give them attention. Hearing kind words helps dogs learn commands better.

Dogs feel happy when they meet people they know, even if they only recognize them by smell. This shows dogs form special bonds with people they know. Dogs behave differently based on their relationship with their owner. Some dogs rely on their owner more, while others are more independent, especially dogs trained for certain jobs.

Dogs in the family

Further information: Companion dog

A study found that the personality of a dog’s owner can affect the dog’s behavior.

Dogs at work

Service dogs help people with disabilities such as blindness, seizures, diabetes, and autism. Detection dogs use their strong sense of smell to find things like explosives or illegal substances. Dogs also help scientists learn about how living things react. Some dogs work in security, police, and military jobs. Service dogs help people facing emotional challenges and have shown good results.

Attacks

Main article: Dog attack

Dogs and humans share a special bond of trust. But sometimes, this trust can be broken.

Some people have been hurt by dogs in the UK and the US. Dogs have thick fur that helps protect them, but people don’t have this same protection.

Some people worry that training dogs to be aggressive can make them more likely to hurt others.

Genetic basis of dog behavior

Scientists study how genes affect dog behavior. They found that some genes are linked to specific behaviors in different dog breeds. For example, some genes may influence how friendly a dog is, how much it barks, or how easily it can be trained.

Research shows that many behaviors in dogs, such as being eager to please or feeling nervous around strangers, come from genes. However, a dog's environment and experiences also shape its behavior. Scientists keep exploring these connections to better understand why dogs behave the way they do.