What are some signs that life on animal farm is becoming unequal?

Signs that life on Animal Farm is becoming unequal include the increasing privileges of the pigs, who begin to adopt human behaviors and lifestyles, such as living in the farmhouse and consuming alcohol. The commandments of Animalism are altered to benefit the pigs, exemplified by the gradual changes to the famous saying, "All animals are equal," which eventually becomes "All animals are equal, but some animals are more equal than others." Additionally, the other animals experience worsening conditions, such as food shortages and hard labor, while the pigs enjoy abundance and comfort, highlighting the growing disparity and betrayal of the original revolutionary ideals.