Flush explores the nature of identity formation through the intertwined lives of Elizabeth Barrett Browning and her cocker spaniel, Flush. The dog becomes an external counterpart to Elizabeth, and his journey of self-awareness sheds light on Elizabeth’s strengthening sense of self. Self-reflection and relationships with others shape Flush’s understanding of himself, and they are also central to Elizabeth’s journey toward forming an independent identity.

In one of the pivotal moments in the novel, Flush spots himself in a mirror soon after he enters Elizabeth’s home for the first time. Until this point, Flush has led a carefree existence, unburdened by much thinking, but this is soon about to change. At first, he thinks that his reflection is another dog, but he gradually comes to realize that he is staring at himself. This is his first encounter with the notion of self, and this symbolic moment of reflection indicates Flush’s gradual awareness of what he is and of his place in the world.

Flush’s encounter with his reflection marks a shift in his identity. While he comes to recognize that he is distinct from those around him, he also becomes deeply connected to Elizabeth.