Many they prefer larger dogs as they think these are calmer than small dogs, who have a different temperament. The little canines earned a reputation for being jealous and bad-tempered, especially in the presence of strangers, but we should not detract from it either, since they are also more agile and happy.
Perhaps humans are to blame for these differences, in fact many believe that small dogs are species of toys. A clear example is in the jump of dogs, if we see that a large dog jumps on a person we see it wrong and we correct itOn the contrary, if this is done by a small puppy, we take it as a nice and happy fact. But the behavior of the dog is itself and regardless of their size they want to mean the same thing.
Something similar happens with the growl, if we see a shepherd alemán that growls at us, we will surely get scared a lot, on the other hand, if a chihuahua does it, we simply think that he is having a bad day and we know that we should not be scared since he will not be able to cause us any harm.
We must not allow our pets to allow exhibit dominant behaviors. Remember that for dogs, size does not mean anything.
Another problem that arises as different within large dogs and small dogs is the referred to space. If you are sitting on the couch and a large dog jumps on it, we will have to run or tell it not to because it can break it. In this case the dog is seeking to take its place by physically marking its territory. If a small dog jumps onto the couch, we will surely pick it up and eat the gesture as a show of affection, without understanding that this gesture also shows that it wants to mark its territory.