You may find this question a little flawed! How can cats all look the same? No animal looks exactly the same.
Indeed, there is no denying that there are obvious differences in the appearance of cats They have different colors and patterns, different body shapes, some round faces, some pointed ears, some drooping ears, and some rolled back.
Some tails are thin, some tails are like feather dusters, some are handsome with long legs, some are born with short legs and so on.
The above are the differences in cat traits, but overall, they are not big.
Why do you say that? If you look at dogs as human pets, you will know what the same species is, but it seems that their genes are completely out of touch.
If you haven't seen dogs before, you won't believe me if I tell you that Tu 1 and Figure 2 are the same species. The first one looks like a mop, and the second one not only has short hair but also has a slender figure.
That's why I would say that dogs are very different, but they are all domestic dogs, and they are all breeds raised by human beings.
So now we begin to discuss why dogs are so differentiated after being raised by humans. Little different from cats?
First of all, we should know that the purpose of domesticating cats and dogs was to help people produce and live better, not to please people. Of course, dogs and cats are more often kept as pets now.
But 10,000 years ago, before humans entered the farming era, they hunted for a living, and some dogs' ancestors, wolves, broke into the human life circle. They are also afraid of large carnivores like humans, so they only dare to secretly pick up the bones and residues left by humans every time.
In the long run, the ancestors of these dogs feel, alas! This kind of life is also good, so they have reached a certain cooperative relationship with human beings, because wolves are creatures with strong racial and territorial awareness and strong teamwork ability;
So their cooperation with human beings can be said to be a match made in heaven! In this way, our ancestors had a good helper and tool for survival.
Since it is a helper and a tool, it is necessary to adapt to different jobs and environments, just as a plum blossom screwdriver cannot be used to screw flat head screws. In order to adapt to different jobs, dogs need different personalities and characteristics.
Let's see what dogs can do for human beings. The fundamental reason why they are qualified for these jobs is that they are naturally smart and have good obedience, cooperation and collaboration skills.
Dogs can help people guard and protect their homes. The work of protecting property safety only needs dogs to be vigilant and does not need strong combat effectiveness. You can bark at strangers to scare them off or remind their owners.
Dogs can also help people graze, but a dog who can watch the door must not have this ability. These dogs should be with sheep that are easily frightened, and they will also be with cattle with bad temper. They must be very clever to help people finish the task of grazing.
Moreover, some dogs need to put a barbed collar around their necks, so as to fight wolves in the wild at any time and protect livestock from being stolen.
Dogs can also help people hunt and track prey. These dogs have a strong sense of smell and running ability, and they must especially obey their owners' orders. Dogs that watch the door and eat grass are definitely not qualified for such a job.
Of course, dogs can also help us save lives, fight, help the disabled and so on.
Every job has different requirements for dogs, so human beings must cultivate dogs, differentiate them into different traits, strengthen these traits through backcrossing, and make dogs behave better in some aspects.
This is why the behavior of dogs is so different. This is the ability that human beings gradually cultivate through breeding to be competent for different jobs.
It won't do any harm to the dog. On the contrary, artificially strengthening some excellent characteristics of dogs can make future generations better.
It can also make dogs have more breeds and more genes.
However, human beings have slowly moved to an extreme in this matter, that is, now human beings do not need dogs to work to a large extent, but let dogs sell cute to satisfy the aesthetic deformity of human beings.
Since the last century, human beings began to pay more attention to the appearance of dogs, rather than the actual working ability or physical health, which led to some dogs only selling cute, losing the fierceness and domineering of their ancestors, and suffering from genetic diseases.
Here are some examples:
The dog in the picture above is a pug of19th century. It is a healthy dog, and there is nothing wrong with its nose and mouth. Look at myna now.
More and more bankbooks are prone to skin diseases, so the mouth is silent, the eyes are more and more prominent, and the nose is more and more sunken. This kind of dog obviously snores and has difficulty breathing when sleeping.
At this time, the change of sausage from the last century to today is really more and more sausage. This kind of dog has no fighting power, just to satisfy human aesthetics. They have no human survival ability.
The above picture shows the change of bull terrier, which is getting uglier and uglier, but they satisfy the aesthetic of human deformity.
This is the price that dogs have paid for mankind over the years. It can only be said that human beings have changed and become more judge by appearances, regardless of physical health.
Let's talk about the cat.
The reason why cats have little difference in appearance is that there are only two jobs that cats can do: catching mice and selling cute.
Cats entered the human life circle only after people entered the farming era and hoarded a lot of food, so hoarding food attracted many mice, and cats and people reached a mutually beneficial relationship.
Cats don't need humans to worry too much about catching mice. They are excellent hunters by nature.
However, in recent years, the same is true. In the matter of selling cute, human beings have also extended their claws to cats, and have also cultivated many alien cute cats, but they have no fighting power.
For example, we often see those cute short legs! Of course, these cats also suffer from genetic diseases caused by inbreeding.
abstract
When humans were still engaged in hunting in fixed places, dogs broke into human life. Dogs can do too much work because of their various excellent personalities.
People have specially bred dogs according to different needs, and these traits have been strengthened through several generations of inbreeding, resulting in different breeds of dogs and great differentiation in appearance.
On the other hand, cats are lonely hunters. They don't like being controlled by humans, and they have no nature of obedience and cooperation, so they can do very little work except catching mice.
Therefore, it is easy for people to shape their own shapes, and there will be no particularly strong injustice.