After overhearing the pigs talking with the farmers, do you think the animals are still proud of being the “only farm… owned and operated by animals”? What would make them feel that way? Do they still work for themselves and not a Master?

Yes, I believe the animals are still proud of what they thought they accomplished. They have been brainwashed so thoroughly that they no longer remember what the rebellion was about.... they only know and believe what has been beaten into them over a very long period of time.