The mice in the laboratory, to put it nicely, are generally mild, and to put it ugly, they are called group stupid, I don't know if it's because of inbreeding.

Recently, Zheng Si often heard Jiao's father's genetics course PPT mention these, so when he saw the cage of mice, Zheng Si sighed in his heart that this was really similar to what Jiao's father said, he really didn't see fear in the eyes of those mice, they might even think that the breeder was coming, busy begging for food.

Dad Jiao grabbed a guinea pig from the cage and put it on the table, and sighed to Zheng: "Look at it, don't let it run around." ”

Zheng Si looked at the little mouse who didn't know that he was about to face doom, and raised a paw to press the tail of the little mouse. The mouse whose tail was held down did not struggle too much, but only showed a posture of crawling forward.

See, this is the difference between wild and domesticated, if those rats outside are held by their tails, they will either desperately break free or bite in reverse.

Jiao's father put the cage containing the remaining four mice into an empty cardboard box so that they could not see what was happening outside.

"I don't know how you cats catch mice, or how you kill mice, I'm just going to tell you about our usual methods."

Saying that, Jiao's father took the little mouse from under Zheng Si's claws.

"Let me tell you, in the domestic laboratory, the basic use is the neck of the slaughter, this is also the least painful method of killing mice, if the technique is neat, it does not feel pain at all, but also in line with the animal welfare theory of foreign people......

Zheng Si squatted next to him and watched quietly, he knew that Jiao's father had entered the teaching state again, and sometimes he would try to speak once after Jiao's father prepared the teaching PPT at home, and the listener was Zheng Si. Therefore, as soon as Zheng Si heard Jiao's father say the words "I'll tell you", he knew that he had entered the teaching state again.

"Death with a broken neck is, to put it bluntly, a dislocation of the cervical vertebrae, which separates the spinal cord from the brainstem. Grab the mouse by the neck with a tool with one hand, grab its tail with the other hand, and pull it violently with both hands. This is one of the methods, and the other method we use a lot, you can also try it, look at ......"

As he spoke, Jiao Dad grabbed the tail of the mouse with his left hand, and moved the thumb and index finger of his right hand to the neck of the mouse and pressed it down.

Then, there is no then.

Zheng Si looked at the motionless guinea pig on the table, and then looked at Jiao's father with a "I'm optimistic about you" expression, and pulled his ears.

"Look, the operation is actually very simple, even if you haven't caught a mouse before, it doesn't matter, just practice for a while, I've seen the speed of your beating Ah Huang, it's definitely no problem to catch up with the mouse."

Ah Huang in Jiao's father's mouth is a yellow tiger striped cat, and it is also one of the bad friends that Zheng Si met after becoming a cat, unlike the "sheriff", Ah Huang always does something ridiculous, many times Zheng Si wants to go up and smoke it when he looks at it, but Ah Huang hasn't appeared much recently, I don't know what the reason is.

Jiao's father caught another guinea pig and asked Zheng Si to try it himself.

Zheng sighed and killed the first one three times before the poor little mouse completely died.

When he killed the second mouse, Zheng Si used too much force, but at least the mouse died without feeling pain. Zheng Si was also more and more glad in his heart, fortunately, he had become a cat instead of a mouse, and if he went down the food chain pyramid, he would have to face one more hell.

"It's easy to dislocate the cervical spine, the cervical spine of the mouse is very fragile, you are mainly unskilled," Jiao's father instructed aloud beside him, "Don't hesitate to shoot, it is best to succeed at one time, otherwise the mouse will be very painful, however, pay attention to the spinal cord and cerebral spinal cord are broken, not directly pull the head off, which needs to control the degree of force, not only to pull the cervical spine off, but also not to pull the head off." Some of the students I took in the past directly caused the pressure in the eyeball of the mouse to be too high because of the problem of exertion, and the eyeball was broken. ”

Zheng sighed: "......"

Nima is so scary!

Zheng Si looked at Dad Jiao's face that was still calm when he said these words, and suddenly felt that Dad Jiao's eyes seemed to glow with cold light.

Zheng Si remembered the topic they talked about when they went to a nightclub with a group of wine and meat friends in the past, and someone said at that time: "In fact, the most powerful killers are not those who look fierce and vicious on the outside, not those who wear nose rings with big knife tattoos, nor those who look particularly awesome with knives and guns all day long, but those who look nothing abnormal on the outside but can easily harvest their lives in the next moment but still don't change their faces." ”

So some senior experimenters are somewhat similar to the killer's temperament from a certain point of view.

The experimenter who enters the experimental state is so scary!

Zheng Si thought about it, perhaps, Associate Professor Jiao is the only person in the world who teaches his cat how to kill mice with a broken neck, right?

When he killed the third and fourth, Zheng Si obviously felt a lot better, at least so that the two mice had a decent way to die compared to the previous two.

Of the five guinea pigs, Jiao's father killed one by demonstration, and the other four were all killed by Zheng Si.

After cleaning up the five dead mice, Jiao's father turned around and went to the back room again, and it was not likely to come out with a larger cage, and there were still five white rats inside, but they were much bigger.

"This is a rat, the rat used in the laboratory is an albino variant of the brown rat, and it still uses the method just now, but the strength is a little bigger, or a little, find the essentials, control the strength, and succeed in one hit. Need me to do a demonstration? ”

Zheng Si shook his head.

"Good boy."

Zheng sighed: "......"

As Jiao's father said, the rats are a little more difficult, but after the five rats have tried, Zheng Si is also proficient.

"Do you still want to practice?" Jiao's father asked.

Zheng sighed and shook his head.

"Very good, let's practice here to kill rats, I'll tell you......"

Zheng sighed and tugged at his ears: "......" is here again.

Although the rats have been killed, Jiao's father's teaching state has obviously not completely withdrawn.

"In our laboratory, in addition to the commonly used cervical dislocation method of sacrificing mice, there are also methods such as decapitation, bloodletting, beating, anesthesia, and poisonous gas...... Next week I'll take a zoological anatomy class to dissect bullfrogs, and I'll bring one back to show you how to do it. Oh, and you should pay special attention to the fact that most of the methods used to kill cats and dogs in the laboratory are air embolism. After a pause, Jiao's father looked at Zheng and sighed, "Do you understand this?" ”

Zheng Si shook his head, his muscles were a little stiff, the hair on his back and tail was still fried, and he always felt that the temperature around him was so low.

"In layman's terms, this method is to inject air into a vein."

Zheng sighed. This is understood, even if he is not very knowledgeable in this area, he knows what will happen if he throws air into a vein.

"Air enters the blood circulation to the lungs, blocking the pulmonary arteries and causing severe shock or death, for example, when you swim from deep water to the dive, the pressure change causes the lungs to expand, which in turn causes the lungs to over-expand, if you don't eliminate the excess gas or there is no time to remove these gases, it is quite dangerous, and some of the passengers in the Titanic who fell into the water died like this."

Jiao's father said that it suddenly occurred to him that it was useless to say to a cat that the Titanic was estimated to be useless, so he turned back to the topic and made a summary, "So, you must pay attention to yourself in the future, stay away from dangerous objects, and pay attention to saving yourself." ”

After practicing the technique of killing rats, tonight's goal was achieved, and Zheng Si also had a score in his heart. Although he is very helpless about catching mice, since he is a cat now, probably only a cat that catches mice can be recognized, and even Ah Huang's second goods can be caught, Zheng Si believes that he must be able to do it.

When he returned to the East Family Compound, Zheng Si saw a car parked in the open space with a familiar face with a military plate.

In this way, the fat guy also came back from his relatives.

Taking advantage of Jiao's father to go to the parking shed to park, Zheng Si jumped on the balcony on the first floor and looked inside.

On the desk by the window is a bag of instant noodles, and a chubby raccoon cat sits on the instant noodles.