All 21 cows from a Harbin farmer were wiped out, and the farmer was suspected of being poisoned. What is the explanation of the local police?

A farmer in Harbin raised 21 cows and all of them were wiped out. The farmer suspected that all the cows died because they were poisoned. The farmer also handed over the inspection report after the cow died and asked the police to investigate the cause of the cow's death. The police stated that they would definitely open a case for investigation. Because after this farmer told the local veterinarian all about the death of the cow, the veterinarian suspected that it might have been poisoned by someone else. As a result, these cattle appeared to be poisoned one after another after eating the feed, and eventually died. A farmer in Harbin had all 21 cows wiped out

As you can imagine, for a farmer, the most valuable thing in the family is these cows, but all of them died. . The farmers can only sell them at low prices, but this also causes huge economic losses to the farmers because the losses are relatively heavy. The parties involved also chose to call the police to deal with such problems, because they considered that it was impossible to die for no reason. It may have something to do with the corn stalks that the cattle eat, but the feed that this farmer feeds his cattle is usually corn stalks produced by himself. The farmer suspected of being poisoned

Because all the cattle were fed with corn stalks produced by themselves, when they fed the cattle corn stalks on the first day, they found that the mental state of several cows was not Extremely good. The farmers didn't pay too much attention that day, thinking that the cows were too tired and ate too much, so they didn't seem to be in particularly good spirits. But when the farmer fed the cattle corn stalks again on the second day, they found that a large number of cattle died at three or four o'clock in the afternoon. The police's investigation results

Because they visited many veterinarians, the results they gave were all suspected to be related to the food eaten by the cows, so the police will also open a case to investigate this matter. No criminals will be allowed to go unpunished. It is conceivable that the 21 cows have caused serious economic losses to the farmers. If the murderer can be caught earlier, this can be regarded as an explanation to the farmers, so that the farmers can demand compensation.