In terms of intelligence, apes are the easiest to domesticate, but apes' ability to obtain food is similar to that of humans, and it is better to raise orangutans than to have a few more children, so apes are excluded from the species selected for human domestication.

Large carnivores are excluded because they can't afford to feed because they eat a lot, and secondarily because they are difficult to control.

In fact, in terms of hunting efficiency, canines are much higher than lions, tigers, leopards and other beasts, and canines have strong endurance, which is similar to humans in this regard, and can well assist humans in hunting. And large carnivores, although they are fast, are actually far inferior to humans in terms of endurance.

Beasts of prey were of limited help to humans in obtaining food in terms of food consumption and predation efficiency, so they were also excluded from the selection of domesticated species before the aristocratic class was created.

Walking upright is actually a form of exercise that requires the least physical effort, and after completing the evolution of walking upright and learning to use tools, humans are at the top of all the food chains in nature.

Evolution, in fact, is a choice of merit in terms of energy consumption efficiency.

With the changes in heaven and earth, the recovery of source qi, and the advent of the era of cultivation, the ability of cultivators to envoy fierce beasts has greatly increased, and the choices of pet beasts have also become rich and diverse.

However, breeding and domestication are two completely different concepts.

The development of beast control is mainly the control of wild beasts, and the highest level is domestication.

But domestication is a long-term, iterative process of selection, and the selection of species requires a large enough population that takes almost thousands of years to complete.

But this domestication involves the question of the economic benefits of input and output, and it returns to the choice when humans began to domesticate wild beasts.

Therefore, since the original intention of people to learn the art of beast control is a speculative choice, the so-called highest level of domestication has no practical significance.

The conditions for selecting alien beasts to assist in combat are very high, first of all, it is easy to tame and obedient, and it is more dependent on humans, followed by growth, low-level alien beasts are not much help for battles between masters, and the other is loyalty and reliability. It also happens from time to time that the beast master domesticated the beast master abandoned the master and fled or even rebelled against the master when the battle was at its most intense.

There are actually not many strange beasts that can meet the above conditions at the same time.

High-level beasts are extremely difficult to tame, and most adult beasts and birds of prey are very strong and unyielding, so they must be cultivated from an early age. Once some powerful beasts recognize their masters, they are extremely loyal and rarely betray, such beasts are called spirit beasts, but they are unavoidable, and they are currently very rare in the Red Flame Continent.

This goes back to the multiple-choice question of when humans first domesticated the beast.

Ling Li and Liang Xiaotian entered a shop, only to see more than a dozen fierce beasts in a large iron cage, including polar silver wolves, black bears, lynxes, and snow dogs, etc., and occasionally the demon beasts would let out a low roar in their mouths, which were obviously not domesticated.

"It's all fourth- or fifth-order alien beasts." Ling Li looked at these alien beasts that were locked in the iron cage, except for a polar silver wolf that might have grown to the sixth order, the others were all already considered adults, and they had no growth.

And Ling Li's target was only a beast that could advance to the seventh order or above, and it seemed that it would be very difficult to buy a beast of this level in the market.

"Are there any high-level flying alien beasts?" Ling Li looked at it for a while and asked.

"There are a few ordinary carrier pigeons and falcons, and high-level flying beasts are difficult to catch, this pet beast is rare on the street, every time it appears, it will also give priority to the supply of important customers, and the flying beasts with good growth will basically not be put on the street to sell." The shopkeeper replied.

Ling Li sighed slightly in his heart, it seemed that this level of alien beast had to come forward to capture it himself.

He was about to leave, but found a clerk walking out of the backyard nursery with a feline cub in his arms, the cat-shaped cub seemed to be sick, listless, messy coat, a pair of ears were drooping, but a pair of small eyes half-open were full of alertness and looked around......

"Huh......" Ling Li stopped, and his eyes suddenly lit up.

"Boss, this little lynx is sick and doesn't eat at all, do you want to take it over and see the veterinarian?" The clerk said to the shopkeeper.

"No, just feed some anti-inflammatory drugs, life and death are fateful." The shopkeeper said, "The veterinarian's consultation fee is too much, and I'm embarrassed not to buy medicine from him." It's just a lynx, not worth it......"

The shopkeeper was obviously unwilling to spend too much on the young beast, but ...... He thinks this little thing is a lynx?!

The lynx is a cat larger than a cat and smaller than a leopard, and can grow to the third order at most, and only a few can advance to the fourth order.

And this young beast, although it looks like a lynx and has not yet been weaned, it is already a third-order alien beast, but it is an alienated snow mountain leopard cub, where is the lynx?

Due to the existence of a system, Ling Li generally does not admit mistakes in this regard.

The shopkeeper apparently didn't realize this.

"This lynx looks pretty cute, it feels very good, raised by yourself?" Ling Li said.

"No, a few days ago, a litter of young animals picked up by the pioneer team in the mountains has not been weaned yet, and it seems that it will only be more than a month." The shopkeeper said.

"A litter?" Ling Li showed some interest and asked, "How many more?" ”

"There are five of them, and the pioneers picked them up in a cave in Longyan Mountain, but they didn't see adult lynxes." "When they first arrived, the little ones looked hungry for days. ”

Ling Li's heart was overjoyed, and he said in his heart that if the adult ice field snow leopard was at home, it would be impossible for the entire pioneer team to be wiped out, and these people were really lucky. Ordinary snow leopards are likely to advance to the seventh order, and this alienated cub is obviously more outstanding in growth, this kind of good thing is rare but not sought, and he will naturally not let it go.

"The little guy looks quite cute, this time out, I don't know what gift to bring to my little sister, I think it's not bad to buy them as pets." Ling Li said, "How much does this lynx cub cost?" ”

The shopkeeper looked at Ling Li, "If you really want it, fifty green gold each, this one is a little problematic." ”

Ling Li thought about it, but his face was also silent, "It should be that the animal milk fed has deteriorated a little, causing enteritis, and it is not a big deal...... I'll take a look at the rest, and maybe I'll want them all. ”

The shopkeeper turned to the young clerk who was only about twenty years old, "Ah Cheng, you go and bring the other four young beasts over." ”

When selling something, you always have to let the customer take a look at it first......