It's not uncommon for a dog to take a dislike to a whole breed or type of dog for seemingly no reason.
Breed Aggression - this is when a dog has an aggressive tendency towards a specific breed, but is fine with all others. This often occurs when a dog has been frightened or even attacked by a particular breed and so learns that that breed represents a threat to them.
No, dogs do not generally discriminate between gender, race or breed. When a dog appears to be doing so, it is usually caused by the dog picking up on some other human's emotions.
Breed. Dogs can certainly tell if other dogs are like them...and scientists have proved that breeds naturally gravitate to other dogs of their kind. As far as liking other dogs outside of their breed, scientists have said certain circumstantial evidence may make a dog more or less likely to like certain breeds.
“Other dogs that either look similar or move in a similar fashion or smell similar” to a much-liked canine friend, says Dr. Crowell-Davis, “can affect one dog's response to another.” Your dog's behavior may also be about you, Dr. Crowell-Davis explains.
Like humans, dogs have individual preferences and unique personalities. That means some dogs may be indifferent to others (just as some humans prefer not to socialize) or they don't vibe (just as humans don't always get along with everyone). Sometimes, two dogs' personalities and play styles don't work well together.
Dogs will typically react aggressively towards other dogs for two reasons, fear, or they believe the other dog represents a threat. Your dog may perceive a threat to their status or safety, or they may even be protecting you against an apparent threat.
But not all dogs are a fan of making friends with their own kind. Some dogs may be reactive or hide when faced with a new potential canine friend, avoiding other dogs at all costs. This kind of antisocial behavior is especially problematic when adding a new pup to your household.
This is when you see one dog trying to engage another dog in play, but the other dog is ignoring that dog by looking away, walking to a different play space or flashing their teeth at the dog. These are all signs that at least one dog doesn't like the other. If you see this behavior, move the dogs away from each other.
Dogs have an amazing sense of smell, which allows them to recognize their own breed. This is because each dog's breed has a unique scent. Dogs also have a strong sense of sight, which allows them to see subtle differences in other dogs' appearance.
Some dogs have the tendency to mesh well with other breeds; whereas some can be outright dangerous for your new furry friend. Dogs that get along well with each other will create a happy and safe environment free from dominance, jealousy, competition, and conflict.
In other words, with different dominancy levels. Even the most dominant of dogs can get along with other dogs so long as the owners display strong leadership and proper dog to canine communication. If dogs are raised together and well socialized, they can be great friends, this applies to all breeds and types of dogs.
Genetic issues.
While many breeders argue that cross breeding produces healthier, stronger dogs, there is no scientific evidence to back this up. Therefore, the combination of two separate dogs could potentially lead to serious genetic entanglement issues; it could work out brilliantly, but also terribly.
For example some breeds are intentionally bred to be more reactive and some to be “wary of strangers”, which might make them more likely to be defensive if approached. In every breed there will be individuals that use aggression inappropriately and others that will not.
In certain situations, it's wise to keep your pet from being around a particularly excitable and highly reactive dog because there is a chance your pet may pick up that behavior. But, most of the time, the behaviors our pets pick up from other dogs are simply a nuisance and will go away when other canines leave.
Dogs in the same household can become aggressive toward each other for a variety of different reasons. Aggression may be dominance-related, territorial, possessive, or caused by fear/anxiety. Some dogs have “alliance aggression”.
Some dogs simply cannot abide other dogs and are happier being the “only child”. This is not the fault of the dog, only a special consideration that makes a dog unique. All dogs have their own personalities, and some are more amenable to canine interaction than others.
Can you teach your dog to get along with others? The short answer is yes, you can. You'll want to have already begun training your pup so that he has learned how to listen to you and so that you can keep control of the situation at all times.
This aggression may be excitement-related or related to frustration or fear. Finally, some dogs become frustrated and behave aggressively toward a housemate dog when they cannot access something, such as a person or animal viewed through the window. This is known as redirected aggression.
Just because a dog is jealous doesn't necessarily mean he's possessive or protective. The jealous dog sees other people or pets as a rival for your attention and love. He tries to force himself in between you and someone else or another pet.
In most cases, your pup growls simply because he is trying to communicate. He might be trying to tell you he is afraid of the other dog or he may be verbally staking his claim on "his territory." Most owners quickly become upset when their pup growl and quite often their first reaction is to scold or punish their dogs.
Dogs that bark and lunge when they see another pooch approaching aren't always displaying frustrated greetings. More commonly, fear is the driving force behind reactivity. If something is making your dog uncomfortable, then being trapped on the leash can heighten their anxiety.