Squealer convinces the other animals to accept what Napoleon decides by stating that the healthier the pigs are the more intelligent and capable the animals would be of keeping humans away. Squealer has great oratory abilities and is able to appeal to the animals' fears.
They were fearful of the power of the British government. They did not want someone to gain too much power over them once again.
Answer:
one would be that they know the land more cause thats where they were raised
