Boxer is a very loyal and hard working horse. He always gets his work done. You could always rely on Boxer to get the work done. He is a strong and brown horse. "i will work harder." the significanse of this quote is he always got the work done on time and done right.
Napolean changed all the 7 commandments at the end to one commandment which was " all animals are equal but some animals are equaler than others."
Napolean symbolizes Joseph stalin because they are both rulers. Similar to stalin, Napolean kicked snowball (trotsky) out of the country. They both went to everything to gain power.