What negative traits are visible in the pigs after the rebellion in Chapters 1-3?

I have read the chapters, but I can only come up with one example.

Which example did you find?

The apples and milk.

"Squealer figures crucially in the novel, as his proficiency in spreading lie-filled propaganda allows the pigs to conceal their acts of greed beneath a veneer of common good. His statements and behaviors exemplify the linguistic and psychological methods that the pigs use to control the other animals while convincing them that this strict regime is essential if the animals want to avoid becoming subject to human cruelty again."

From:
http://www.sparknotes.com/lit/animalfarm/section3.rhtml

To identify negative traits in the pigs after the rebellion in Chapters 1-3, it's essential to closely analyze the text. Since you mention having only one example, I'll provide some additional ones to help you get a more comprehensive understanding.

1. Greed: One of the most prominent negative traits seen in the pigs is their greed for power and privileges. In the early stages of the rebellion, all animals are considered equals. However, as time progresses, the pigs seize control and begin to question the authority and decisions of the other animals, ultimately giving themselves more privileges and benefits.

2. Manipulation: The pigs exhibit a talent for manipulation, using their superior intelligence to persuade and control the other animals. They utilize propaganda techniques, such as altering the Seven Commandments, to convince the others that their actions are justified.

3. Arrogance: The pigs become increasingly arrogant as they consolidate their power. They start considering themselves as the elite ruling class and demonstrate a sense of entitlement. This arrogance is apparent in their disregard for the other animals' concerns or opinions, further highlighting their negative traits.

4. Corrupt leadership: The pigs gradually adopt human-like qualities and adopt behaviors reminiscent of the previous human oppressors. They engage in behaviors that go against the initial principles of the rebellion, such as making alliances with humans and exploiting other animals for their own benefit.

Remember, identifying specific examples to support these negative traits from the text will allow you to provide a more thorough response.