They represent the rich upperclass Russians who weren't that much affected by the Revolution, and kept alot of the things they owned.
The Cat isn't always at the Farm, possibly referring to how the Upperclass Russians weren't so useful regarding Communism and the Revolution.
The symbol of the Cat in Animal Farm is a topic of debate, and this answer might not be 100% true, so you might want to double-check with other links and websites.
The ribbons in Animal Farm represent the "badge of slavery", which means if the animal works hard he or she is rewarded with a ribbon, and is expected to do work better on the farm.
The animals in "Animal Farm" represent different groups of people and political ideologies in society.
Mollie represents the bourgeoisie or upper class in Animal Farm.
russia
nothing
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Animal farm the book represents the Russian 1917 revolution. The animals represent russians. The farm represents Russia.
Vladimir Lenin.
The Russian Revolution
Leon Trotsky
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he was a dunk