who am I

 I look like a giant, cute squirrel with no tail. My ears are not the slightest bit in proportion with my head! My  hair is golden brown, short and rough or sometimes black with fairly long tufts. When I am an adult I will only be a tad smaller than you. More people than you would think have me as a pet. By the way, did I mention I am the biggest rodent in the World. What am I ?



 P.S Post a comment with your guesses. This is a hard one.