From Everything Is Illuminated
[Refering to the dog
] This is Sammy Davis Jr. Jr... She is Grandfather's Seeing Eye bitch. Father purchased her for him not because he believes Grandfather is blind, but because a Seeing Eye bitch is also a good thing for people who pine for the opposite of loneliness. In truth, Father did not purchase her at all, but merely retrieved her from the home for forgetful dogs. Because of this, she is not a real Seeing Eye bitch, and is also mentally deranged.