The original question had to be edited down. I would suggest that Orwell is able to open the reader's eyes to what is happening through the invocation of a third person point of view. Orwell is able to allow the reader to see small details that help to accentuate how power is shifting from Old Major's vision of Animalism to one in which the pigs have become the new humans.
The mere description of where the pigs sit, in terms of jockeying for position in the front of Old Major during his speech is contrasted with how Clover and Boxer delicately shepherd the other, smaller animals inside. Details such as Orwell noting that the revolution started with the other animals and not the pigs also help to bring out how there is sacrifice, but not from the pigs. The mystery of the apple and milk mash is another narrative detail that Orwell uses to bring about the intrinsic unfairness that emerges with the pigs' leadership. In describing the slaughter of the animals in Chapter 7 and the running off of Snowball in Chapter 5, Orwell is able to bring to light how there is suffering at the hands of the pigs. In describing Boxer's death in Chapter 9, Orwell brings out how he kicked and then stopped kicking as he was quickly taken from the farm. These details allow the reader to feel empathy for the other animals, victims of the pigs' leadership. It is here in which Orwell is able to utilize a third person point of view to bring about details and individual events that fit a larger narrative of the animals suffering under the rule of the pigs.