How does Orwell foreshadow the pig's decision to share the milk with the rest of the animals?

The pigs who "could already read and write perfectly ...... None of the other animals on the farm could get further than the letter A." It is this passage which foreshadows the pigs' subtle and cunning decision to literally hog all the milk and Apples on the farm by taking advantage of the illiteracy of the other poor gullible animals.At the end of Ch. 3,Squealer manages to convince the other animals why the milk was necessary for the pigs.