rebelling on their farms. Orwell writes,

"Nevertheless, they were both thoroughly frightened by the rebellion on Animal Farm, and very anxious to prevent their own animals from learning too much about it" (15).

Despite an attempt to stop the rumors from spreading, the news about Animal Farm continues to circulate. The animals feel encouraged and hopeful when they receive the news about Animal Farm. Orwell writes that a "wave of rebelliousness ran through the countryside" (15). Orwell writes,

"Bulls which had always been tractable suddenly turned savage, sheep broke down hedges and devoured the clover, cows kicked the pail over, hunters refused their fences and shot their riders on to the other side" (16).

The animals also sing Beasts of England to glorify the rebellion. This angers the humans and they begin to punish any animal that they hear singing the song. Although the humans try their best to appear calm, they are concerned that the animals on their farms might usurp power. In regards to how humans feel when they hear Beasts of England, Orwell writes,

"...when the human beings listened to it, they secretly trembled, hearing in it a prophecy of their future doom" (16).

In George Orwell’s Animal Farm, the animals who work on Manor Farm rebel and take over the farm. Their goal is to achieve better and more equitable treatment than they had received under the management of Manor Farm’s original owners, Mr. and Mrs. Jones. When he first approaches the animals with his idea, Old Major says,

Remove Man from the scene, and the root cause of hunger and overwork is abolished for ever.

Man is the only creature that consumes without producing. He does not give milk, he does not lay eggs, he is too weak to pull the plough, he cannot run fast enough to catch rabbits. Yet he is lord of all the animals. He sets them to work, he gives back to them the bare minimum that will prevent them from starving, and the rest he keeps for himself. Our labour tills the soil, our dung fertilises it, and yet there is not one of us that owns more than his bare skin.

Following the rebellion, humans and animals on other nearby farms learn of what has occurred at Manor Farm, which is now known as Animal Farm. Orwell writes,

By the late summer the news of what had happened on Animal Farm had spread across half the county. Every day Snowball and Napoleon sent out flights of pigeons whose instructions were to mingle with the animals on neighbouring farms, tell them the story of the Rebellion…

Other farmers were “very anxious to prevent their own animals from learning too much about it.” Nevertheless, the animals on adjacent farms do learn about Animal Farm. The thought of eventually being able to govern themselves gives these other animals a new sense of optimism and hope.

Rumours of a wonderful farm, where the human beings had been turned out and the animals managed their own affairs, continued to circulate in vague and distorted forms, and throughout that year a wave of rebelliousness ran through the countryside. Bulls which had always been tractable suddenly turned savage, sheep broke down hedges and devoured the clover, cows kicked the pail over, hunters refused their fences and shot their riders on to the other side. Above all, the tune and even the words of Beasts of England were known everywhere. It had spread with astonishing speed. The human beings could not contain their rage when they heard this song, though they pretended to think it merely ridiculous. They could not understand, they said, how even animals could bring themselves to sing such contemptible rubbish. Any animal caught singing it was given a flogging on the spot. And yet the song was irrepressible. The blackbirds whistled it in the hedges, the pigeons cooed it in the elms, it got into the din of the smithies and the tune of the church bells. And when the human beings listened to it, they secretly trembled, hearing in it a prophecy of their future doom.

Of course, the irony is that the animals on Animal Farm are working like slaves even in the early days post-rebellion:

However, back on Animal Farm, ALL that year the animals worked like slaves. But they were happy in their work; they grudged no effort or sacrifice, well aware that everything that they did was for the benefit of themselves and those of their kind who would come after them, and not for a pack of idle, thieving human beings.

This is not a very clear question.  I am not sure what you mean by "relate to."

The humans who won the neighboring farms are very unhappy about the revolution that has happened on Animal Farm.  So they try to undermine the animals and (eventually, attack them).

When this does not work, the humans start to try to exploit and cheat the animals.  This is seen most of all when Frederick cheats the animals on the woodpile deal.

Finally, the humans start to get along with the animals when the animals become just like the people.

The neighbors seemed to be concerned about what was happening on Animal Farm. They were concerned that the concept could spread to their own farms and their animals could overthrow them.

At first, I think they made fun of Jones, maybe even felt a little compassion for him, but the threat of their authority being overthrown became very real, especially after they tried to help Jones take back his farm.

As the story moved on, the other farmers worked to try to outsmart the animals' leader Napoleon and then finally they begin to try to work with him.

These other farmers may have represented other world leaders during the time of the Russian Revolution's aftermath.