Typically when a dog sniffs a person they are uncomfortable with, it's due to the pheromones that person is giving off. To the dog, those pheromones may signal a threat or an alarm telling the dog to beware. Humans can also give off pheromones that reek of fear or nervousness to a dog.
People need to keep in mind that all dogs are individuals with unique preferences, likes, and dislikes. While some dogs like baths, others hate them, and while some like fetch, others aren't interested. Similarly, while some (probably even most) dogs may like you, some won't.
Remember, a dog that doesn't like you might actually just be kind of scared of you — and this fear can manifest itself in physical ways. "If the dog is fearful, he may cower or crouch, pull back his ears, tuck his tail, hide, or tremble," Sueda told Insider.
There are multiple reasons that a dog may exhibit aggression toward family members. The most common causes include conflict aggression, fear-based, defensive aggression, status related aggression, possessive aggression, food guarding aggression and redirected aggression.
Fear. If your dog typically growls at strangers, specific people, such as children or men, or when the dog is in an unfamiliar place, the growls are most likely due to fear. A dog may also growl in situations that trigger fears, such as during thunderstorms or fireworks displays.
Most scientific studies indicate that it is very possible to rehabilitate a dog after they bite another dog or person.
In many cases, being afraid of men can be traced to a lack of socialization with men when the dog was a puppy. Even a dog that has lived with a man can be fearful in the presence of unfamiliar men. Men can be more intimidating in a dog's eyes.
Dogs choose their favorite people based on positive interactions and socialization they have shared in the past. Like humans, dogs are especially impressionable as their brains develop, so puppies up to 6 months old are in their key socialization period.
Dogs are perceptive. They can tell when you don't like them, and it hurts their feelings—just like with people! Dogs are sensitive and intelligent creatures. They're very smart, especially since they have heightened senses that allow them to sense things that humans can't see or hear (like us).
'I can see bad people'
Studies have shown that dogs take note of people who are unkind in any way to their owner and will then hold a grudge against them. One study, published in Neuroscience and Biobehavioural Reviews, revealed that dogs wouldn't take treats from someone who refused to help their owner with tasks.
A lack of proper socialization as a puppy is another reason some dogs fear strangers. Puppies that don't have a chance to meet a wide variety of people are more likely to develop a fear of people they don't know. Dogs with a history of abuse may also be afraid of strangers.
It's likely not about you at all. There are many reasons why dogs don't show a lot of affection. First, if your dog was adopted, his former home may have improperly cared for him — or worse, abused him. If so, your dog may have trust issues or even feel afraid of humans.
Dogs Prefer Adults — Particularly Women
Dogs don't, as a rule, dislike men, but most dogs are cared for by women, and are thus more comfortable around them. A single woman is more likely to have a dog than a single man; in a couple, the woman is more likely to handle the dog's care.
The short answer is yes, most dogs do have favorite people. As social animals, dogs tend to be happiest and healthiest with company. And because domesticated pets depend on their people to meet virtually all their needs—food, shelter, and even access to the bathroom—these dog-human bonds are strong.
You should NOT punish a dog for biting. This method may also teach the dog not to give a warning prior to the bite. It certainly doesn't do anything to minimize the dog's stressors.
While there's little doubt that dogs are capable of feeling primary emotions, which include feelings such as happiness, sadness and fear, there's far less evidence that dogs experience what are called secondary emotions, which include guilt and shame, says Scientific American.
It is absolutely essential to work on training and socialization with your dog as soon as possible after the bite. The best plan is to contact a professional trainer and possibly a veterinary behaviorist. Many dogs with aggression can be helped through training, socialization, and behavior modification.
Bottom Line: When your dog growls at you I recommend that you listen to what your dog is saying. Immediately stop doing whatever it is that you're doing and move away.
"The goal is to teach the dog that it will receive a favored treat or reward that is even more appealing than the object in its possession." Approaching calmly, offering a food reward and taking the possession, praising the puppy and returning the object teaches the puppy that your actions are not to be feared.
Straight off the bat you should be correcting your dog's growling and/or snapping with a firm “no” at the onset of the behavior. When he stops growling, reward him with a “good boy”, or in the beginning, a treat if it's handy at the exact moment of training so that he knows what he is being rewarded for.